Love this so much:

The goal of this book is to quickly get you using the core ideas of calculus to answer real world questions, and to leverage the power of the computer to help you learn.

It was written for people who think they can’t understand calculus.

Calculus for the People

Very useful resource for folks looking to learn a bit more math. Adding a fun element of a “real world” scenario makes it more engaging:

Incoming Missile? Of course.