I’m chatting with the Global Math Department on 12/15/15 about using student work as the driver of teacher learning. Consider this post a repository for pertinent links, my slide deck, and a comment section for further conversation.
Link to working google doc for the session:
[Global Math Department 12/15]
LISTEN: Podcast in which we with Belleville New Tech facilitators about using Looking at Student Work (LASW) to drive teacher learning: [School Innovations Podcast Episode 305: Looking at Student Work, Driving Instruction]
WATCH: Video of a staff using a protocol to analyze student work
More on Looking at Student Work (NTN Website)
emergent math 
Wow, GMD is a crowd of math teaching rock stars, but no velvet rope, so I was able to sneak in, too!
Two further thoughts:
(1) Probably important to make sure that the feedback around the task and student work isn’t all critical. I’m not making this point to be touchy-feely, but recognizing things that are going well and continuing/encouraging them can be as important as fixing weaknesses.
(2) Math teachers hate the chained equals/operations, like this from the student work:
$1.89 * 5 = $9.45 * 52 = $491.40 per year
Well, I understand that this mis-uses the equal sign, breaks the concept of balance, etc etc.
On the other hand, almost anyone reading that line will probably understand what is meant. Also, since this “error” comes up so often, it suggests (a) the idea reflects student thinking and (b) there is an actual need for notation to reflect this.
Is there already something standard that students can use instead?
If not, two suggestions are an arrow -> or smirky smley :-> to indicate that the quantity immediately to the right is the result of simplifying the expression on the immediate left (usually through a calculation. This would give us two ways of re-writing the student example:
$1.85 per day * 5 days per week = $9.45 per week
$9.45 per week * 52 weeks/year = $491.40 per year
or $1.85 per day * 5 days per week :-> $9.45 per week * 52 weeks per year :-> $491.40 per year