A component of preservice teacher education is the methodology of teaching mathematics using manipulatives. To enhance prospective teachers' understanding of the use of manipulatives to teach mathematics, interactive video can provide an effective medium to bring the reality of the school classroom to the university classroom. Two interactive videodiscs were developed for use in mathematics education courses. The discs contained classroom scenes of teachers and children from three grade levels using manipulatives to develop conceptual understanding of mathematics topics using geoboards and numeration blocks. These discs were integrated into lessons presented to preservice teachers as part of their methods course. The contents of the videodiscs and the way they were used in the lessons were evaluated through interviews with 19 preservice teachers and analyses of their responses on a 7-point scale. Their generally favorable responses will be used to improve disc content and the way discs are used for instruction. (Contains 20 references.) (Author/SLD)