If you want an even quicker, less expensive introduction to word building (prefixes, suffixes, and the basics of word roots), try this packet. It includes the complete lessons 1,2, and 4 from the Introduction to Roots and Affixes at the top of this page.

It gives full explanations and practices for suffixes and prefixes. Then one lesson shows how to recognize new words from roots you already have seen. You will also practice with words from a few roots, especially cedere. It's the root of access, excessive, precede, process, and success (as well as many other words).