The primary purpose of this study is to examine the effect of knowledge for teaching mathematics and teaching practice on student mathematics achievement growth. Thirty two teachers and 299 fourth grade students in three elementary schools from one school district in urban area participated in the study. Most of them are Hispanic in origin and…

The U.S. charter school movement has expanded rapidly, but this growth is geographically uneven at the school district level. Focusing on Arizona--which has the least restrictive charter school law in the United States--we use district variables to determine the factors driving charter market share in 41 districts. Included in our analysis is an…