I have posted video explanations to all of the math questions in the 2016 December ACT Form 74H Test.

I have posted the video explanations to all of the math questions in the 2016 June ACT Form 72F Test.

I just posted the video explanations to all of the math questions in the 2016 April ACT Form 73E Test.

 
I just posted the video explanations to all of the math questions in the 2015 December ACT Form 72E Test.

I just uploaded video explanations to all of the math questions in the 2015 June ACT Form 73C Test.