TY  - BOOK
AU  - Marzano,Robert J.
AU  - Frontier,Tony
AU  - Livingston,David
TI  - Effective supervision: supporting the art and science of teaching 
SN  - 9781416611554 (pbk. : alk. paper)
U1  - 371.2 
PY  - 2011///
CY  - Alexandria, Va.
PB  - ASCD
KW  - School supervision
KW  - Teachers
KW  - Performance standards
ER  -