It is not realistic to directly address all vocabulary words that students have difficulty with. Focusing on strategies, including learning the meaning of common prefixes and suffixes, is an excellent way to empower students to figure out word meaning. In therapy, we will discuss common prefixes and suffixes of the student’s grade level, or reading level, if that is more appropriate. We will talk about common words with that prefix or suffix. As homework assignments, I may have the student look for words in reading materials with the prefix and suffix that we worked on, and have them try to figure out the word meaning based on their knowledge of the prefix or suffix. In my observation, students really enjoy learning these strategies because they feel like they are solving a mini mystery and they feel empowered. Here is a the best list that I have found for prefixes and suffixes, based on grade level.