You have some grammar exercises here, as a review...:
Lecciones
11 and 12
Spanish
verbs
http://www.plu.edu/~lrc/span200/
Discipline: Spanish
Title: Sabias que
Author: Bill VanPatten (write it exactly like this)
Publisher: McGraw-Hill
Then you will need to buy the key for the Online Manual
vol. 2.
You can also see the videos from every lesson at www.mhhe.com/sabiasque4
Go to Student edition (bottom, left) and select the
lesson you want (up, left).
Lecciones
11 and 12
Lecciones
13 and 14
Lecciones
15 and 16
Lecciones
17 and 18