Mathematical Reasoning: Develop it in Guided Math Groups and Math Centers
Here are some great games that help your students to engage in algebraic reasoning! Do these type of games weekly to develop the required thinking for CCSS Mathematical Practice 2. Often times, I play the games with the students in guided math groups. I also play them with the whole class and we talk out the possibilities. Students will say what they think it is and why. These kinds of activities are great for developing mathematical talk as well. I also encourage teachers to set them up as math centers and students can play them with partners.