Joe Dimino describes a study examining the use of teacher study groups (TSGs) to increase teacher knowledge and improve practices with respect to vocabulary and comprehension instruction. In this session, Dr. Dimino outlines the content of the TSGs as it relates to vocabulary instruction. The vocabulary scope and sequence for the TSGs is designed to provide teachers with information on categories of the natural contexts in which words are situated; selecting words to teach; developing student friendly definitions; developing examples, non-examples, and concrete representations; developing activities to promote words learning; using context to determine word meanings; and reviewing and extending word learning.