The attached PowerPoint from EV3Lessons.com covers basic gearing structures for the LEGO Technics building system.
Attached Resource:

Material Type:
Lecture/Presentation
Education Level:
Middle School [2]
High School [3]
Focus Subject:
Engineering [4]
HW Platform:
EV3 [6]
SW Platform:
Any [7]
Interactivity Style:
Mixed [8]