A drop-down list of keywords is accessible via the Subject field. The keywords are based on the Thesaurus of ERIC Descriptors. The terms were selected to best describe the subject(s) of the KCDL listing. As an example, general terms such as Mathematical Concepts, Mathematics Skills, Problem Solving as well as the names of specific types of mathematics - Algebra, Calculus, Geometry - are assigned frequently to Mathematics curricula. Decide whether your search will be general or specific, then select terms accordingly.