TY - BOOK T1 - Teaching and learning mathematics in the 1990s T2 - Yearbook / National Council of Teachers of Mathematics A2 - Cooney, Thomas J. A2 - Hirsch, Christian R. LA - English PP - Reston, VA PB - NCTM YR - 1990 UL - https://tuklas.up.edu.ph/Record/UP-99796217606749661 OP - 248 CN - QA 11 N25 1990 SN - 0873532856 KW - Mathematics : Study and teaching. ER -