75747522
Jul 12, 1999
Jul 3, 2001
PRE-RECORDED CD-ROMS AND COMPUTER SOFTWARE, AND TEACHERS' MANUALS WITH REPRODUCIBLE MASTERS OF STUDENT WORKSHEETS PACKAGED AND SOLD AS A UNIT THEREWITH, FOR STUDYING MATHEMATICAL CONCEPTS
Electrical and Scientific Apparatus[ PROVIDING AN ON-LINE COMPUTER DATABASE IN THE FIELD OF MATHEMATICAL EDUCATION ]
Education and Entertainment