TY  - BOOK
AU  - Lamon,Susan J.
TI  - Teaching fractions and ratios for understanding: essential content knowledge and instructional strategies for teachers 
SN  - 9780415886123
PY  - 2012///
CY  - New York
PB  - Routledge
KW  - Fractions
KW  - Study and teaching (Elementary)
KW  - Ratio and proportion
N1  - Includes index
ER  -