Prepositions of movement
With clip art pictures
At, in, on, to
English Grammar Online preposition page
Intermediate list with quizzes
More Comprehensive List of Preps
Scroll down and look at menu at the left for prepositions sorted by time, space, relationship, etc.
Jennifer's Preposition Pages
Yes, Jennifer has a video for everything! But these are good for students to view/review points about prepositions on their own
Just for fun:
Grammar Rock YouTube video of common prepositions
Yes, a little young, but classic!