Calculus gives access to quick approximations through various methods. But how accurate are these approximations? Students frequently struggle in dealing with errors of approximation. This session will explore different ways to help students visualize both error bounds and the methods used to find them. As Alternating Series Error Bound was added to the AP* exam last year, we will address this topic and its difference from Lagrange Error Bound using the Mathematical Practices for AP* Calculus.