TY - BOOK ID - 137607962 TI - Powerful professional development : building expertise within the four walls of your school. AU - Dana, Nancy Fichtman AU - Yendol-Hoppey, Diane. PY - 2010 SN - 9781412979757 PB - Thousand Oaks Corwin DB - UniCat KW - Professional learning communities KW - Teachers KW - In-service training UR - https://www.unicat.be/uniCat?func=search&query=sysid:137607962 AB - ER -