Iris Weiss of Horizon Research says her team couldn't comprehensively measure the effects on student achievement because the NSF didn't initially require school districts to address that question and because the projects served such a wide range of grade levels. (discovermagazine.com)
-- that's designed to be used and discussed across a wide range of grade levels. (edutopia.org)
Design: A variety of educational projects cover a wide range of grade levels and course curriculums. (educationworld.com)