Langrall, Cynthia W Techers engaged in research : inquiry into mathematical classrooms, grades 3-5 / edited by Cynthia W Langrall - 1st ed. - U S A : Information age publishing, 2006. - 223p. : ISBN: 9781593114978 Subjects--Topical Terms: Research Dewey Class. No.: 372.7 / LAN.T