This study examined the comprehension skills and strategies presented in current reading textbooks used within the United States as a means of describing a contributor to the ecological component of reading. The ways in which comprehension skills and strategies are distributed across genres as well as connected to the National Reading Panel…

We estimate relative achievement effects of the four most commonly adopted elementary mathematics textbooks in the fall of 2008 and fall of 2009 in California. Our findings indicate that one book, Houghton Mifflin's "California Math," is more effective than the other three, raising student achievement by 0.05 to 0.08 student-level…