por Ann D
•30 de jan de 2017
Shame on you University of Houston System
I did the first three lessons, which are less than average, then went on to quiz 1, after completion, a window appeared to ask me for money to get my results! This information should have been provided when I enrolled! I find that very mis leading.
por Siddharth K
•1 de mai de 2016
Great review for the AP Physics 1 exam!
por Nakul S
•15 de jul de 2017
Helped me sooooo much!!! Great for high school physics.
por li w
•15 de mai de 2016
nicenice
por Maestro S
•18 de dez de 2016
amazing
por HowardZhou
•15 de mar de 2016
Too much question and it takes me too much time on it
por Lane W
•14 de ago de 2017
There are few mistakes in the video.
por Aidan H
•31 de out de 2016
Some content on quizzes wasn't covered in the videos