TY  - BOOK
AU  - Checkley,Kathy
TI  - The essentials of mathematics K-6: effective curriculum, instruction, and assessment 
SN  - 1-4166-0369-7
U1  - 372.7 CHE 22
PY  - 2006///
CY  - Alexandria, Va.
PB  - Association for Supervision and Curriculum Development
KW  - Mathematics
KW  - Study and teaching (Elementary)
KW  - Study and teaching (Middle school)
N1  - Includes bibliographical references (p. 161-167) and index
ER  -