I took the first subtopic under number basics. It is a quiz that has 10 questions on the topic. At the end of the subtopic, the student gets a breakdown of how many questions they got correct or missed.
A student can click on any problem they missed and the app will explain why they missed it.
I see my students using this if they plan to take the ACT itself so they are more familiar with how questions are asked and develop the vocabulary used. Since my students are ELL, this really will help them develop their background knowledge and prepare them for the ACT.