The present study is the first to examine the computation estimation skills of dyscalculics versus controls using the estimation comparison task. In this task, participants judged whether an estimated answer to a multidigit multiplication problem was larger or smaller than a given reference number. While dyscalculics were less accurate than…

This study demonstrated the effectiveness and efficiency of a constant time delay procedure (four seconds) to teach five elementary students with learning disabilities multiplication facts. Learning generalized to a paper-and-pencil task, to a different presentation orientation, and to reverse facts. (DB)

The acquisition of multiplication facts by four elementary students with learning disabilities was compared under two instructional delivery formats--teacher directed and computer assisted. All students mastered more facts in the teacher-directed condition. In addition, teachers provided many more opportunities to respond and showed a higher…