Teach students how to copy and paste code to manipulate code to work with additional arduino parts. Teach them how to use the code library and website to self build what they want and add it to their robot. Link to https://www.arduino.cc/en/Tutorial/BuiltInExamples
(differentiation day: student that are behind get time with teachers to troubleshoot. Students that are ahead get to look through the cd/mega book and learn how to do more at own pace.