September 10, 2018
Robotics is popular in many schools and is a great tool for teaching kids the most fundamental engineering design (ED) and programming skills, while allowing them to see and interpret the results of their build and program in real time.
Also, through building and programming robots, kids of all ages can learn about computer science (CS), mechatronics, coding, literacy, physical science, mathematics, healthy competitiveness, teamwork and perseverance.
Learning robotics and participating in competitive events also serves as the backdrop for helping students understand the use of robots in more authentic contexts. In the real-world, robots help in space, in manufacturing, on military missions and the list goes on. Artificial intelligence (AI) also makes it possible for intelligent robots to interact with humans in their homes by helping with household chores, providing security and even entertainment.
Unfortunately, in-depth learning of high-level robotics is not highly accessible to all students, and often when it is, the necessary rigor is not always applied during instruction. That means students are getting only part of the learning and not the bigger picture or the rich interdisciplinary and integrative nature of mechatronics — which is the intersection between electrical and mechanical engineering and CS.
For teachers wishing to engage their students in building and programming with high-level robotics, I highly recommend using VEX Robotics. Although deeper learning with a tool like VEX takes time, any learner can achieve mastery through precise and consistent practice. I recently led an Egineering Design course training for the International Technology and Engineering Educators Association (ITEEA), where I had the privilege of coaching educators through the process by using the VEX EDR. I used the following four steps — which is how I recommend teachers proceed with students.
No one appreciates being asked to do something their instructor hasn't done. For this reason, it is essential for teachers who are coaching students through their first robot build to arrive in class with their own built working model. This synergizes the classroom by giving students the confidence that the learning is not just for them, and that their teachers are just as invested in the process as they are.
Providing some guiding questions is also helpful for beginning with the end in mind:
Once students have their learning goals, guide them in unboxing their kit. Don't let kids who are new to VEX robotics do this alone or in groups. A VEX robot has many moving parts and deals with several complex systems. Someone with prior experience must lead this part.
I highly recommend having students categorize each of the parts (along with an explanation of each) into the following four groups:
Typically, I do not recommend having students follow a tutorial step-by-step, but due to the complexity of an initial VEX build — I would in this case! The VEX guide for building the Clawbot is an excellent introduction to the robot build and for learning the uses of most of the parts categorized by students in Step 1.
And although their first build will not be open-ended, using a guiding question (like those in Step 1) will enable students to tap into their creativity and resourcefulness when programming their bot.
Students already familiar with electronics or robotics such as littleBits or LEGO Mindstorms will already be familiar with the concepts and functions of motors, sensors, gears and system development. However, the metal/aluminum structures and configuration of the VEXnet system or the new V5 system will most likely be very new to them. For the others, everything they encounter will be new and perhaps be intimidating. So give your learners time to explore and learn through guided practice and gradual release of responsibility.
Note to teachers: Although this step could be carried out independently by an experienced and patient builder, I recommend pairing your students for the initial build. Uniting the structural and motion components is not an easy task. By working cooperatively, the students will realize the need for teamwork.
Whenever I encounter learners in my workshop with significant expertise in VEX EDR, I assign them an open-ended robot build and program that must adhere to specific criteria and constraints. That keeps them engaged, allows them to expand on their creativity and prevents them from doing all of the heavy mental lifting in a group that often deprives less experienced learners of the vital toil necessary for more in-depth learning.
Because of movies and cartoons, many kids (and adults) think of droids whenever robots are mentioned. However, it’s important for them to understand that most robots are not created for appearance (whether human or machine-like) but more so to carry out repetitive actions, tasks and jobs that are either too dangerous or impossible for humans to do on their own.
Students will also need to understand that magic doesn’t make robots work or move efficiently. Instead it's an amalgamation of systems working in concert — that rely on electronic controls (such as sensors and microcontrollers) and programming software for instructions.
Even before programming (Step 4) students should learn that motors, wheels, gears, shafts and also pneumatics (among other accessories) is what enables motion in robot mechanism. For helping them make some of these connections, offer a couple of the learning targets (LTs) that I constructed for the Clawbot build:
Try these sample troubleshooting questions whenever students get stuck. Bear in mind that you’ll most likely need to help them make visual connections by using your teacher-created model (see Step 1).
Luckily VEX Robotics provides preloaded default code on the VEX Cortex Microcontroller. After your students have completed a successful Clawbot build and have successfully paired their joystick to the cortex, allow them to run the default program (Note: they won’t be able to see the code). For many students seeing the robot they built move forward and backward, lift and lower its arm, and open and close the claw will make them feel like superstars! Allow them this moment of celebration and be sure to engage them in reflection. Also advise them that they will need to learn programming skills to make their robots move beyond the default program.
Now it’s time to really learn how to program. These are the steps I use to coach my students and simplify the process:
Note: I love using ROBOTC because it assists students with learning real-world C programming skills that are used by both engineers and computer scientists. Therefore, I highly recommend using the ROBOTC Natural Language Library on the Carnegie Mellon Robotics Academy website.
No doubt, learning and teaching to build and program high-level robotics is not easy and is a time-consuming process. However, this is part of the labor that is required for developing students who will become great engineers and computer scientists. Unfortunately, we can’t pass the buck and keep our fingers crossed that they’ll learn it in college. It starts in K-12 and is ongoing lifelong process. A.P.J. Abdul Kalam once said, “Great teachers emanate out of knowledge, passion and compassion.” And I believe that great students need great teachers who are willing to expand their knowledge base (see the ISTE Standards for CS Educators) for no other reason than it’s what our kids need.
My sincerest gratitude to Tim Oltman, James Westmoreland and Kenyatta White-Lewis for guiding my learning by helping me connect my CS previous knowledge with new skills in robotics.
Want to dive in deeper or use other resources for computational thinking, robots/robotics other than VEX EDR? Try some of these:
Jorge Valenzuela is an educational coach and a graduate teaching assistant at Old Dominion University. He is also the lead coach for Lifelong Learning Defined, Inc., a national faculty of the Buck Institute for Education, a national teacher effectiveness coach with the International Technology and Engineering Educators Association (ITEEA) and part of the Lead Educator program for littleBits. You can connect with Jorge on Twitter @JorgeDoesPBL to continue the conversation.
Read the original post at iste.org.
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