Yes, you are free to sell your educational courses. However, in order to avoid violating Arduino´s trademarks, you should name your course in a way that doesn’t suggest that the course you are offering is officially endorsed, approved, or certified by Arduino. Additionally, using the Arduino logotype to identify the course would be a trademark violation so make sure to use your own logo.
|Programming Course based on Arduino||Arduino Programming course|
|Robotics Workshop for Arduino||Arduino Robotics Workshop|