This is a fascinating idea. Students should summarize each chapter in a "tweet" or 140 characters. As the lesson plan says "Every word counts and most important events should be included." You could do some fascinating things with this in class. This is a high school literature assignment.
I am floored to find 617 lesson plans using Twitter on the TES site. Some talk about social networks and society, advertising, etc. and others are recommendations for teachers, however, Twitter is increasingly becoming PART Of lessons and what we do. I think that eventually we'll have to make friends with social media in education just as we did with email.
This SAT prep program is free and has more than 60 lessons in math, reading, and writing. It also includes a score projector. This is something parents CAN have their children do to prepare for the test (unless you want to get my FAVORITE book for this -- SAT prep for dummies .)
As an SAT coach at my school, the probability questions often challenge students. Here is a set of SAT probability questions to help students for the SAT (there is one coming up next week if you're a math teacher, you might want to print this out.)