Vocabulary Practice click HERE 

Make sure you're in the correct unit, go to "Additional Practice," under "Student Resources", there's an iWords section, click on one of the words in the unit list, then "word map" in the upper right. This will take you to synonym, antonym, and definition practice.

Grammar Practice click HERE 

To study Unit Tests, go to "Additional Practice" & "Practice Quizzes" (make sure you're in the correct Unit).