NSF invites proposals for research projects that will investigate the effectiveness of interventions designed to improve student learning and achievement in preK-12 science and/or mathematics, with an emphasis on middle and high school. Technology should be a part of the intervention or used in an essential manner of the analysis of the intervention. An estimated $22 million is available in Fiscal Year 2004. NSF expects to make one scaling award of up to $5 million for five years, and 10 to 12 contextual awards of up to $2 million over five years. Letters of intent are required and are due April 1.