Monday, November 17, 2014

Understanding STEM Education in a SMuh Education World


By Stephen Portz (’13-’14 Albert Einstein Fellow)



Our President has identified the STEM initiative as a critical National Security Issue – “if we do not improve the quality and quantity of science, engineering and math students as well as the general technological literacy of our workers, our country will lose significant quality of life and world leadership standing.” (Moravec, 2010).


Our Nation's STEM Initiative - the curriculum integration
of Science, Technology, Engineering, and Math instruction.
As a career and technical education (CTE) teacher with little familiarity teaching in anyway other than STEM, the STEM movement has been intriguing to watch. The purpose of our CTE programs is to prepare students for the workplace. To this end each program involves integrating the academic curriculum and delivering instruction in the context of how the skills are used in the world of work. Since I am also an engineering technology teacher, which represents two of the four spokes on the STEM wheel, I believe that I have a really good grasp of what STEM Education is supposed to be. That said, part of me was excited about the STEM movement because it is as if the entire world is waking up to what CTE teachers and industry experts have always known - that students learn best when academic skills are taught contextually in integrated real world applications, and not simply as discrete skills. Unfortunately, the other part of me is now perplexed, because as I look around, I am not seeing practitioners that seem to understand what STEM Education is supposed to look like.

 

Can You Pass Me Some More SMuh Please?


STEM Education without the T-Technology, and E-Engineering portions is not STEM, it is simply SMuh. There is no hierarchy in this model, so none of these subjects is more or less important than the other. If any one of the elements is missing it is not STEM. While methods of delivery may differ from district to district, the principle is unbending; if you do not treat STEM as an integrated system it is not STEM (Sanders, 2012). If your instructional strategy is not integrating science, technology, engineering, and math as a cohesive unit, it will not have its desired effect and all you will have is SMuh. Which begs the question, if the STEM movement calls attention to the problem but then does nothing to break from the traditional academic math and science model, what good is it?


I think the reason many districts are struggling with the implementation of STEM is they are unclear what the technology and engineering pieces are supposed to look like. Many believe that covering the Technology piece is simply about giving their students iPads or laptops to use in a science or math class.

Few leaders forming district, state, and national education policy have much experience with Engineering, so implementation there is lacking. Technologies are the products of engineers. The work of scientists is to make discoveries in their questioning of WHY. The work of engineers is HOW to take scientific discoveries and design them into products for economic and societal benefits. It stands to reason then, if our students are not engaging in engineering activity that leads to technological creation, they are likewise not actively involved in STEM Education.

The Essential Importance of Integration


The Next Generation Science Standards (NGSS) speaks highly of the importance of content integration. The fact that a major portion of the standards addresses the need to recognize crosscutting concepts is both affirming and condemning. It is affirming in that it recognizes how powerful it is when our students make connections with other concepts, applications, and disciplines. It is condemning in that by raising the notion of crosscutting concepts to such a level of importance in the standards, it is an admission that previously it was not being done.

NGSS gives further encouragement for the ideas of subject integration: “Students should not be presented with instruction leading to one performance expectation in isolation, rather bundles of performances provide greater coherence...also allow(s) students to see the connected nature of science and the practices.” (NGSS, Volume 1, 2013)

Are Science Teachers Qualified to Teach Engineering?


While the NGSS recognizes the prominence that engineering must have in the curriculum to satisfy the President's charge, its solution is to have science teachers teach engineering in addition to their science curriculum:
Science and engineering are integrated into science education by raising engineering design to the same level as scientific inquiry in science classroom instruction at all levels and by emphasizing the core ideas of engineering design and technology applications.” (NGSS, Volume 2, 2013)
Air Rockets activity with after school program students 
at the Richard Byrd Library - Alexandria, VA

As far as this model goes to support STEM, the fact remains that science teachers are very poorly equipped to teach engineering: “Few science teachers have had even one engineering course. The faculty members who prepare future teachers...have limited experience with engineering education. Thus the current generation of teachers has not been prepared to incorporate engineering into science teaching”... and, “Even if science teachers did have appropriate preparation in engineering education...the science curriculum is already filled. There is insufficient time to do justice to current science topics, much less add a new layer of new requirements.”(Bull and Slykhuis, 2013, p. 1).

Another concern with the “have science teachers teach engineering” model is the imperative that whoever conducts engineering instruction have a background in the requirements of industry – how is engineering used in the workplace? “Studies are converging on a view of engineering education that not only requires students to develop a grasp of traditional engineering fundamentals, such as mechanics, dynamics, mathematics, and technology, but also to develop the skills associated with learning to imbed this knowledge in real-world situations.”(NGSS, Volume 2, 2013, p. 16)

Since a traditional science educator would have gone through the typical teacher preparation program in college, it is unlikely that many would have had any industrial work related experience. How is a science teacher in this situation going to be able to effectively demonstrate and explain the work of an engineer when they do not understand it and have never done it themselves?

If NGSS seeks to raise engineering design to the levels of scientific inquiry, are science teachers prepared to teach engineering design? A significant tool of engineering design is a 3D parametric design program. With this application, engineers are able to virtually model designed parts and assemblies, return to past iterations, run finite element analysis, animations, mechanical, thermal, and fluids simulations all from a desktop. (Hayes, Goel, Tumer, Agognino & Regli, 2011).

To neglect the preeminence of 3D modeling in an engineering toolkit and reduce engineering design to a notion of experimental trials in the fashion of scientific inquiry does grave injustice to the discipline:
Design thinking represents a sophisticated ability to scope problems, consider the alternatives, develop solutions....and optimize products iteratively using STEM skills.”And, “Engineering design is difficult to learn, teach, and assess, and is studied less than scientific inquiry.” (Katehi, Person, & Feder, 2009).

Without instruction in engineering design and its associated tools, our students will not be able to access emerging desktop manufacturing and the forthcoming revolution in industrial design, innovation, and entrepreneurship. “Engineering experience and understanding is required to take advantage of emerging desktop manufacturing capabilities, many teachers do not fully understand engineering, engineering habits of mind, or design thinking.” (Berry, Bull, Chiu, Lipson, Xie, 2013).

STEM Models to Consider


I have long held the belief that the STEM crisis in our educational system did not happen despite our best efforts at educating students, but was more likely caused by it. Our silo thinking philosophy of academic instruction, which leaves many students behind, is not founded in research in how students learn best or in the requirement of real-world application. Turning back to an academic model as the solution to the problem that was most likely caused by this mindset is flawed circular reasoning. Clearly, if the challenge to effectively teach engineering education is beyond the scope of what science teachers can perform, what should be done?


The T and E of STEM are the applied portions. Just as in college, many science courses cannot be adequately covered without the lab course which is taken concurrently with the academic course; so to, for STEM to work it must include opportunities for hands on engineering design work creating technology. One way to do this would be require a T and E lab course in concert with math and science offerings. By having a dedicated engineering course of study along with their academic courses, students learn to ply their academic and technological skills in the context of how they will be used in the world of work.


Similarly, career academies with an engineering or technology focus gather student cohorts and establish a school within a school small learning community. History has shown that if you desire to build and accelerate growth and capacity in an area, one of the best ways to do it is to gather it as a community. STEM career academies accomplish this by attracting students with similar career interests and structuring their academic program around the interest. STEM academy students share common academic teachers along with an engineering or technology teacher. This teaching team coordinates curriculum and instruction to align with the students shared career interests to focus the instruction where it will be of the most usefulness and interest to the academy students.


Some examples of how STEM career academy teams can do this are with thematic units that are cross curricular. Students studying Greek and Roman civilizations in history class can find intersections with the literature of those times in language arts class as well as the civil engineering and weapons technologies in their CTE class.


As previously mentioned, a significant barrier to the integration of engineering and technology in math and science classes can be with the math and science instructors themselves, if they cannot communicate to their students how the skills they are teaching are utilized in the world of work. This is where industries can help with teacher externing and summer industrial fellowships.


A vocational business exchange program (VIBE) matches teachers with industry and grants up to 80 hours of paid placement with a local industry. I participated in just such an experience with NASA when their electrical engineering group was renovating the Space Shuttle Launch Control Complex. At the time it provided me with a state of the art experience in computer aided design and the use of smart schematics. In another example, STEM teachers are provided with industrial work experiences during their summer break. This model provides a win, win, win, solution as businesses and industry does their part to enhance education and provide for a strong pipeline of future talent; Teachers benefit by better understanding how academic skills are used in the workplace and they realize enhanced credibility with their students as they relate the experience back to classroom practice; but the real beneficiary are the students who can then make better connections between the classrooms skills and future jobs.


There are very successful models across the nation that integrate academic instruction with an engineering CTE program to create effective STEM instruction. Such programs replicate engineering design activity through the use of project based learning (PBL) which naturally integrate STEM subjects: “...the STEM PBL challenges provide students with authentic real-world problems captured and re-enacted in a multi-media format designed to emulate the real-world context in which the problems were encountered and solved.” (Massa, DeLaura, Dischino, Donnelly, Hanes, 2012).


Anytime a teacher makes a requirement for students to learn, collaborate, or produce a project using the appropriate technology, they leverage the learning gains by not only providing learning content in a compelling way, but in the context of how it is used in the world. As we do this, we provide our students with the skill set for tomorrow’s workplace. That is the true charge of the STEM movement.


When we give our students opportunities to make connections with academic content and real-world technological applications, our students will learn better, our industries will have a skilled workforce, and the President's charge will be answered.




Stephen Portz is an Albert Einstein Distinguished Educator Fellow, placed with the National Science Foundation. Prior to this appointment, he worked for Brevard Public Schools in Florida where he has taught Engineering and Technology for 25 years. Sportz.einsteinfellow@gmail.com


Berry, R., Bull, G., Chiu, J., Lipson, H., Xie, C. (2013). Advancing Children's Education Through Desktop Manufacturing.

Bull, G. and Slykhuis, D. (2013). NTLS Design Challenge: Science & Engineering Strand.

Hayes, C. C., Goel, A. K., Tumer, I. Y., Agognino, A. M., & Regli, W. C., (2011). Intelligent Support for Product Design: Looking Backward, Looking Forward. Journal of Computing and Information Science in Engineering, 11(2), 021007.

Katehi, L., Pearson, G., & Feder, M. (2009). Engineering in K-12 Education. Washington, DC: National Academies Press.

Massa, N., DeLaura, J., A., Dischino, M., Donnelly, J. F., Hanes, F., D. (2012). Problem Based Learning in a Pre-Service Technology and Engineering Course. American Society of Engineering Education.

Moravec (2010) “Obama: Education is a National Security Issue.” Educational Futures. Jan 7, 2010.
Next Generation Science Standards: For States, By States. 2013. Volume 1: The Standards. Achieve Press Inc., Washington DC.

Next Generation Science Standards: For States, By States. 2013. Volume 2: Appendixes. Achieve Press Inc., Washington DC.

Sanders, M. (2012). Integrative STEM Education as “Best Practice,” International Technology Education Research Conference, Queensland, Australia.

Saturday, November 1, 2014

How to Give Students the Skills to Access 3D Printing, Desktop Manufacturing, and Industrial Design:




Industrial Design – The Impending Renaissance
By Stephen Portz and Joshua Aurigemma

In the 1980’s three technologies converged to create a revolution in the printing world.  These technologies were the Macintosh computer with a WYSIWYG feature, the laser printer, and postscript fonts.  Each of these innovations played significant roles in providing for what we now know as desktop publishing.  Giving the masses the tools to create their own published works forever changed the graphic arts, printing, and publishing worlds.
Similarly, the product design trifecta of 3D design software, rapid prototyping machines, and open source electronics, are creating a perfect storm with which to launch a new age in desktop manufacturing and industrial design.


Photo 1 - "LovLit" Candle Prototype by Industrial Designer Joshua Aurigemma


The Parallels are Unmistakable

Desktop publishing technology not only altered forever the way publishing took place, but it created a boom in the study and practice of graphic arts.  Most companies at that time had entire departments devoted to promotion, product advertising, print layout, and publication; the nature of the work demanded it because it was mostly a manual activity with significant levels of artistry involved.  With desktop publishing, most of the nuances of the craft could be automated through software applications and high quality computer printers.  As a result, anyone with these desktop technologies could learn how to publish and many did.  Across the nation, graphic arts programs were expanded and desktop publishing courses were offered in most every high school in the country.

Many industry leaders are predicting a similar event taking place in the field of desktop manufacturing.  The technologies have aligned in much the same way for 3D manufacturing that they did for desktop publishing.  In a recent edition of “Make” magazine, 23 commercially available desktop 3D printers are reviewed.  Most of them carry a price tag of less than $2000, but some are available for less than $1000.  The simple fact that the “Make” magazine did not even exist ten years ago and that Maker Faires numbered over 100 conferences on five continents across the globe this past year, speaks to the exponential growth of the movement.  For comparison’s sake it should be noted that one of the first widely available commercial laser printers, the one that essentially launched the desktop publishing revolution, cost almost $7000.  With the price of a suitable computer and publishing software, a desktop publishing workstation back in the day cost over $10000.  Today, a quality desktop manufacturing workstation can easily be had for less than half of that cost.


Photo 2 - Afinia 3D Printer (Courtesy Afinia Corp)

With greater ease of access to the tools of manufacturing, the entire world of inventing and product ideation will enter a new age of development.  How should we prepare our students for this?

The Elements of Desktop Manufacturing 

3D printers allow users to take virtual creations of solid objects or assemblies of objects and “print” them in successive vertical layers of extruded molten plastic.  An additive design, 3D printer, or rapid prototyping machine is much like the marriage of an ink jet printer and a hot glue gun but with the addition of the Z axis.  The computer directs the nozzle of the printer to extrude a layer of plastic material, moves the nozzle to the next layer height, and does it again. 

There are other types of 3D printing technologies, but this method is by far the most common and the least expensive for would be desktop manufacturers.  The computer system is so ubiquitous it barely merits a mention in passing, but any system used must be powerful enough to effectively drive the 3D design modeling software.  Common programs include SolidWorks, Inventor, Solidedge, PTC Creo and others.  Each program is very graphics intensive and requires powerful processors and graphics card support.  These professional programs are expensive and boast a steep learning curve, but there are free programs available for younger students and entry level users.  These include Sketchup, 123D Design, Blender, Tinkercad, OpenScad, and others.  While any three dimensional drawing program that allows you to output to an .STL or similar format file will do, the work of an industrial designer highly favors a professional drawing tool.
 
Open Source Electronics

The development of open source electronics has in a similar fashion put the design of the control aspects of the product in the hands of the consumer.  Formerly accessible only to electronics manufacturers with expensive printed circuit board design and printing equipment, open source electronics control options give the would be inventor the ability to design, construct, and prove sophisticated prototypes that use computer processing control.

 The Arduino microcontroller is one such solution.  With the footprint of a credit card, it allows a developer to control an electronics system by using 14 input/output pins.  Control software and programming is uploaded to the flash memory via a USB port.  Additional and specific functionality is provided to the Arduino by stacking commercially available boards or “shields” to the microprocessor.  Arduinos are used extensively in robotics design, perhaps most notably in the popular quadricopter UAVs.
  Photo 3 - Raspberry PI (Image Courtesy of Raspberry PI Foundation)

 Another open source option for electronics control is the Raspberry PI.  Created about the same time as the Arduino, the PI is not just a microcontroller it is an entire computer in miniature. The Raspberry is powered by a 5 volt micro USB connection. It has a 700MHz processor with a half Gig of SDRAM.  There are video out ports for HDMI to drive a monitor with resolutions up to 1920 x 1200, but there is also a composite RCA to allow connection to a television set.  A 3.5mm jack is provided for audio in/out as well as an Ethernet port for networking and two USB 2.0 ports.  For storage, the Pi uses SD cards with the operating system preinstalled. 
 
Industrial Design and Industrial Design Education

With the convergence of these technologies, the foundation is set for a renaissance in industrial design.  Just as access to the tools of publishing created an explosion of desktop design and publishing, along with an educational movement to support it, so too will desktop manufacturing necessitate instruction in the elements of product design.

Much like engineers, the work of an industrial designer is to balance design criteria with constraints and trade-offs to optimize solutions; But with a twist, industrial designers seek to add value by increasing utility and significance of products.  To do this, designers use the intersections of desirability, feasibility, and viability to arrive at the optimum solutions to a product idea.  What are the dynamics of each of these qualities that makes such a difference in good designs?
Desirability – Does the product have value to the consumer?  Obviously this quality is relative as winter clothing doesn’t have near the appeal in Florida that it has say in Minnesota.
Feasibility – This is the engineering aspect of the design.  It may have enormous merit and potential to the consumer, but do we have the ability to make it, make it so it works, and make it so lasts?
Viability – Are we able to make the product with the means and methods that will allow us to realize a reasonable profit margin? What is the competition doing?  Can we add value to the market? What is our benefit to risk analysis?

Inventing by using the Industrial Design Process

With these tools of product design and development our workforce is empowered to evolve from the aspiration of being job seekers to now being job creators. But what is the process of product design and creation?
Photo 4 - StoryBoarding a Product Idea  (Image Courtesy of Joshua Aurigemma)

Effective designers are quick to observe societal needs.  They use their multidisciplinary knowledge of people, business, and materials, manufacturing methods, engineering and aesthetics to create things of value. 

A common technique in product ideation is storyboarding.  Storyboarding allows the designer to flesh out the intricacies of the problem as well as demonstrate how the solution may be refined.

If there is parity between a recognized need and a product that fulfills the requirements of that need, the designer moves on to refine their design.


  
Photo 5 - Product Form and Function Workup  (Image Courtesy of Joshua Aurigemma)

(The genesis for an electronic candle idea emerges from the metaphor of a growing affection as a light which glows brighter, or the obverse effect, with the candle dimming.  This prompts an idea for adding value to the design by using a Bluetooth system driven through the cellphone network. The technology allows for a matched pair of candles to synch with one another across the world to communicate affection and let the other candle’s owner know they are being thought of.  One owner picking up and holding the candle will cause their light to glow brighter.  The other owner’s candle gradually synchs with the original to also begin to glow brighter).


Photo 6 - Refined cross-sectional design of a product idea (Image Courtesy of Joshua Aurigemma)

Every designer has a different style. To characterize all industrial designers and reduce their activity to a step by step cookbook process oversimplifies the art.  There are layers of consideration which draw upon the designer’s expertise all along the way that challenge the premise of their designs.  Again, like engineering, industrial design is a true iterative process and the best designers are able to dispense with unworkable solutions quickly and intuitively.
Photo 7 - Early electronics circuit design of product (Image Courtesy of Joshua Aurigemma)

Which comes first?

Is the electronic schematic determined before the designer starts proto boarding or does the designer document schematically what the circuit ended up being after trials on the proto board?  Does the designer know what the shape of the product will be before they draw it up, or do they draw it up and then learn what the shape will be?  The answer to both questions is “yes”.


Photo 8 - Prototyping the Product Circuit (Image Courtesy of Joshua Aurigemma)

Changing accessibility in the industry

Desktop manufacturing will automate many of the heretofore skilled manual tasks in much the same way as desktop publishing systems automated previous publishing industry methods.  Much of the work of industrial design is prototyping.  This is usually conducted by laboriously hand cutting forms in wood, shaping foam materials, creating molds and castings using wax, plaster, silicone rubber, and plastics.  The artistic aspects of this process were formerly a barrier to career entry as an industrial designer.  Now, much of this art is eliminated by using the 3D printer - rapid prototyping machines.

 Photo 9 - Refined Product Prototype (Image Courtesy of Joshua Aurigemma)

How can teachers prepare students to be industrial designers?

Teachers can help students by giving them familiarity with modeling and design tools.  Giving our students abilities with these processes adds powerful tools to their repertoire toolkit. In this way students begin to view problems as potential products that they can see themselves creating.

What exactly should be in our student’s toolkits?

The world is 3D and our students need to visualize and design in 3D.  Give students the ability to represent ideas in 3D by teaching them to use a 3D drawing program.  Get an inexpensive 3D printer and require students to design and produce 3D output using the device.  Teach basic electronics with simple proto boards.  Then teach them electronics control methods using a Picoboard, Arduino, or Raspberry PI and require them to do a project.  Use a simple programming language like Scratch or Lego Mindstorms to learn to write a custom electronics control script.  Teach them the skills of craftsmanship using traditional shop tools.  Introduce a unit on inventing and innovation and require a product from each student.
We are entering the age of mass entrepreneurship, where small companies with the ability to respond quickly to consumer needs will be rewarded.  It will be an age of so called “black collar” workers, so named after the peerless Steve Jobs and his characteristic black turtleneck.
Desktop manufacturing has the potential to change our educational purpose from helping our students to become job seekers, to helping our students to become job creators as they learn the principles of industrial design and go on to create innovative products on their own.


 Photo 10 - Testing the Product Prototype (Image Courtesy of Joshua Arigemma)


Stephen Portz is an Albert Einstein Distinguished Educator Fellow,  Prior to this appointment, he worked for Brevard Public Schools in Florida where he has taught Engineering and Technology for 25 years. sportz.einsteinfellow@gmail.com


Joshua Aurigemma is a freelance Product Developer with a B.S. of Industrial Design from
Georgia Institute of Technology. He embraces 3D CAD, desktop manufacturing and open-source
electronics to develop products. joshua.aurigemma@gmail.com







Text Box: Photo 11 – Prototype design being tested by a potential consumer.