Today in a workshop with Sally Keyes of the **Silicon Valley Math Initiative**, we started off the day with what I would call a jig-saw problem. Each of us was given a clue, and the instructions that for this activity we could not use pencil or paper, or share our clue card directly with our group members, but that we could talk about our clue. We sat in a group, and had some counters, beans, and paperclips we could use if we wanted.

The problem we were given was called **Four Kids with Figs**. Each of us had one card with one clue on it, and together we tried and figured out how many figs each kid had. During the problem solving, Sally walked around the room and listened to us work, but she very rarely interjected any of her ideas, she mostly just listened and used what we said to debrief the problem afterward.

Not having pencil and paper (or access to any other recording devices) meant that we couldn't easily record what each other said, and this led to increased discussion between us, and the need to use the manipulatives we were given to create a shared representation of the problem. We also had a discussion around what makes collaborative groups work better, which probably helped our group work be more focused. Having ownership over a clue meant that each of us had to interact with the others at least enough to ensure that our clue was interpreted by the other members of our group.

We had a very interesting problem solving session, and I attempted to capture a snapshot of our work above. It was fascinating to me to see how we ended up representing our solution for the problem using the manipulatives we had, and how the constraints of the task influenced our work. I could see this structure being a really useful way to facilitate mathematics discussions and problem solving in a classroom setting.

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David is a Formative Assessment Specialist for Mathematics at **New Visions for Public Schools** in NYC. He has been teaching since 2002, and has worked in Brooklyn, London, Bangkok, and Vancouver before moving back to the United States. He has his **Masters degree in Educational Technology from UBC**, and is the **co-author of a mathematics textbook**. He has been published in **ISTE's Leading and Learning**, **Educational Technology Solutions**, **The Software Developers Journal**, **The Bangkok Post** and **Edutopia**. He blogs with the **Cooperative Catalyst**, and is the **Assessment group facilitator for Edutopia**. He has also helped organize the first **Edcamp in Canada**, and **TEDxKIDS@BC**.

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