Assessing Microbit Programs and Grading in Google Classroom is easy if you have your students use the add file option in the "turn in" portion of Google Classroom. Teachers can grade if they download the student's hex files and import them into the Makecode.microbit.org simulator.
Import student files!
Watch this helpful video if you have any questions.
Kim Mattina (@The_Tech_Lady) shows you how to get it done!
Another solution is to have your students screencast their simulations and submit their video files. Either way, these performance-based assessments are super-engaging!