Presenting and Selecting Tools: The first week of school, Mia introduces her students to the concept of showing a “math idea” by using tools. She challenges her students first to “tell their hand” in a whisper voice what she’s trying to show with her tool. In doing so, she engages the students in identifying that the tools can be used for different purposes without telling them directly that a given tool is used for a particular purpose.

**CONSIDER:**

How does Mia model her use of tools as a means of introducing them to students?

These videos are discussed in the Inside Mathematics guide "Using Tools in Support of Thinking, Mia Buljan, 2nd grade," one of 10 practice-focused guides on building classroom climates for mathematical learning.

The videos document key mathematical practices observed in teacher Mia Buljan's 2nd grade classroom over the course of a school year. In the guide (available as a PDF or an iBook download), you can explore extended narratives and questions for reflection around "using tools in support of thinking."

Day 2: Activating students’ sense of wonder in the use of tools for real-life situations [Presenting and Selecting Tools]

Day 2: Presenting new tools and modeling their use [Presenting Tools]

Day 2: Establishing consensus about noise level and care of materials [Presenting Tools]

Day 2: Practicing putting away math bags and doing so quietly [Presenting Tools]

Day 3: Differentiating tools from each other [Presenting Tools]

Day 3: Inviting students to compare answers and defend their thinking [Using Classroom Supports]

Day 14: Observing students’ use of tools to diagnose their thinking and strategy [Using Classroom Supports]

Day 14: Helping students understand the purpose of the pocket 100 chart [Using Classroom Supports]

Day 110: Students use tools to convince others of their approach [Using Tools in Support of Thinking]

Day 110: Praising students’ explanation of thinking [Using Classroom Supports]

Day 158: Students make use of tools to devise their own problems [Presenting Tools]