I taught Newton's Laws this year with Mosa Mack. When I compared the final unit scores with last year's score (without Mosa Mack), my students' scores increased!

In fact, on one of my student's tests, she wrote: "I learned this from Mosa Mack" in their test. 

The part that I love about MM is that i don't have to search through it, everything is there.

Mosa Mack is an excellent resource! It gave me the ability to FINALLY move around the room and facilitate my students' learning. 

One of my students had trouble learning about a time/motion graph and she looked at me and said "do you have any Mosa Mack videos for this?"