It’s time for a “lesson study” meeting in Marie Coffaro’s second-floor classroom here at Paterson School 2. Yet it looks more like fun-and-games time. The school’s mathematics facilitator, two tutors, ...

One of the standards for mathematical practice in the Common Core is to "construct viable arguments and critique the reasoning of others.” That’s a tall order for students used to sitting quietly in a ...

Marna Wolak’s fifth grade students at Sanchez Elementary in San Francisco are gathered on the rug for a “number talk.” Wolak is getting her students thinking about fractions, noticing patterns and ...

Vicki S. Collet agreed to answer a few questions about her book, Collaborative Lesson Study: ReVisioning Teacher Professional Development. Vicki Collet is an associate professor of curriculum and ...