Formative Assessment

Just read an interesting blog from Heather Mullins-NWRESA-on formative assessment. She talks about two teachers who share their major assessments with the kids in advance to gauge how they will do and what concepts have been taught well. What a novel idea! She says that we are no longer the keeper of knowledge, but we are to share. How would your lessons look differently if you knew what your kids know before you give them THE TEST? What would their knowledge look like? Can you give up this power?