Rescued my calc grade – Calculus X: College and AP Calc Test Prep and Tools Review

When the school year first started I was following my class all right, but then things got harder and my grade started dropping. Since I downloaded this app and started using it four to five times a week my grade has been improving and I've been understanding the material much better.
Review by Santiago7878 on Calculus X: College and AP Calc Test Prep and Tools.