This video, from Khan Academy, is about modeling different things with differential equations and this topic is well explained by modeling population.

A thorough reference guide to differential equations. It provides definitions, examples, and an interactive activity that enhances further explanation. Includes links to related topics.

Students learn about Newton?s method. Newton?s method is an example of how differentiation is used to find zeros of functions and solve equations numerically. The tutorial consists of examples with detailed solutions.

This University of St. Andrews page offers an excellent biography on Gaspard Monge, a French mathematician and diversified scientist (1746-1818.) Discusses his life and his contributions to these fields.