Before students begin work on the Triangles task, they have a whole group discussion about what does the task asking them to complete/do. Students share ideas on approaches and what might be confusing as they proceed.

# Triangles

## Revisiting Lindsey’s Question

As the class discusses the rule t + 2 as a solution to the Triangles task, the teacher, Cindy, asks them to consider where the +2 comes from in the visual representation. After some discussion, Lindsey poses the question, ‘Why isn’t it plus 4?’

## Lindsey’s Question

After students have worked on the Triangles task in small groups, the teacher, Cindy, asks the class to discuss the rule t + 2 and where the +2 comes from the visual and symbolic representations. Near the end of the discussion, Lindsey poses the question, ‘Why isn’t it plus 4?’

## Amanda & Jackie

After students have worked on the Triangles task, Jackie and Amanda each share their solution methods. Cindy asks the class if the two methods can be connected to each other.