What happens in classrooms? [electronic resource] : instructional practices in elementary and secondary schools, 1994-95 / Robin R. Henke, Xianglei Chen, Gideon Goldman ; Mary Rollefson and Kerry Gruber, project officers.
Imprint
Washington, DC : U.S. Dept. of Education, Office of Educational Research and Improvement : For sale by the U.S. G.P.O., Supt. of Docs., [1999]
