PREFIXES AND SUFFIXES
I think that the best way to get your students to learn the meaning of affixes is simply to get them to see words with them FIRST then breaking those words down into parts. This worked for me! I think that in doing so they would be better able to build new words knowing that the smallest of parts contain meaning. I have done some breaking and building with my class and they had lots of fun at it! Actually they spent a lot more time figuring out the meanings of the words than they did breaking them down!
Here are a few ideas for you to try!