The purpose of this activity is for students to learn Stage 2 of the Which One? center, which was first introduced in kindergarten. One student chooses a shape from the gameboard without telling their partner. Their partner asks "yes or no?" questions about the shape's attributes. They use counters to cover up shapes that have been eliminated until they figure out the mystery shape. Students work with triangles and quadrilaterals.

• “What questions did you ask that were most helpful?” (Does your shape have 3 sides? Are 2 sides the same length?)

The purpose of this activity is for students to choose from activities that offer practice adding and subtracting or working with shapes. Students choose from previously introduced stages of these centers:

• Can You Draw It?
• Match Mine
• Capture Squares
• Target Numbers

• “How did you decide to work with shapes or numbers?”