Below is a list of resources that you can use to practice vocabulary/grammar:
For a lot of these websites, you'll need to find the concept that we're studying in class and practice it using the exercises on the website.
http://go.hrw.com/hrw.nd/gohrw_rls1/pKeywordResults?keyword=EXP1 (This is your textbook website! It is VERY useful!)
http://www.elmaeagles.com/spanish.htm (Verb Practice)
http://go.hrw.com/hrw.nd/gohrw_rls1/pKeywordResults?keyword=EXP1 (Textbook exercises)