Abstracts of 36 research reports are provided. The reports were prepared by investigators for presentation at the 55th annual meeting of the National Council of Teachers of Mathematics. A broad range of topics related to mathematics education is covered. Nine reports deal with problem solving, eight are concerned with instructional methods, five with space and geometry, and four with numbers and operations. Two reports concern reading and writing skills in mathematics, two deal with testing and measurement procedures, and two concern program evaluation. Other papers deal with logic, effective teachers, learning aids for the blind, and models of mathematics learning. (DT)