TY  - GEN
AU  - Gardella, Francis J
TI  - Introducing difficult mathematics topics in the elementary classroom: a teacher\'s guide to initial lessons
SN  - 9780415965026
U1  - 372.7 
PY  - 2009///
CY  - New York
PB  - Routledge
KW  - Curriculum Planning
KW  - MATHEMATICS STUDY & TEACHING
ER  -