Suffixes  

Songs and Poems

1. The Logical Song by Supertramp
2. Ation by Shel Silverstein

Practice and Explanations

1. Suffixes to Know
2. suffixes, meaning, online quizzes, and worksheets
3. Adjectives and Adverbs 1
4. Adjectives and Adverbs 2
5. Noun, Verb, Adjective, Adverb Word Families
6. http://www.ac-nancy-metz.fr/enseign/anglais/Henry/end.htm
7. Suffix and prefix, definitions and practice

Specialized Suffixes: 

1. Medical Terminology
2. Job Titles (er, or, ist)
3. People (er, or, ar)
4. Most of the time, words that end in "ly" are adverbs, here is a list of adjectives that end in "ly"; here is some practice.
5. Phobias (fears)

Many thanks to www.ac-nancy-metz.fr for the great list of links.