Interface needs work
Some of the graphs are so tiny that they are illegible. It is impossible to answer questions when the numbers are so tiny you literally can’t see them. I’m using This app to review the 5th grade curriculum so I can help my daughters who are struggling with math. This app presents the concepts without any explanation of what they are but it’s an interesting way to learn through trial and error and game dynamics. However, it needs a thorough proofing for usability by and adult.