Online: Nasa Rocket Equation Training

Beginner's Guide to Rockets
NASA, 8 January 2012
http://exploration.grc.nasa.gov/education/rocket/shortr.html

The Beginner's Guide to Rockets will help you learn the basic math and physics that govern the design and flight of rockets. We'll look at many different kinds of rockets, from stomp rockets, which are a special kind of artillery shell, to bottle rockets, to model rockets, to full scale boosters. We'll look at the similarities and the differences in these rockets and include some instructions for making and flying your own rockets.

Here's the first page of the site:
http://exploration.grc.nasa.gov/education/rocket/bgmr.html

Here's the Index:
http://exploration.grc.nasa.gov/education/rocket/shortr.html