AR3 TUTORIAL VIDEOS:
AR3 Startup Video
AR3 Programming Video
Follow Chris Boden in this video series on the complete build of the AR3 robot:
(warning there is some adult language in this series and may not be suitable for classroom or younger viewers) 
AR2 TUTORIAL VIDEOS:
Many thanks to Chris Boden for taking the time to document building the AR3 robot
Donations: https://streamlabs.com/Physicsduck