Fact Family Triangles
This lesson can be used as a pre-lesson for the Fact Family Trees lesson plan.
Students will be able to write related addition and subtraction facts within 20.
Students will be able to describe how the numbers in a fact family are related with content-specific vocabulary using visual and partner support.
- Draw a triangle on the board, and ask students what shape it is.
- Write the numbers 15, 7 and 8 inside the corners of the triangle, with 15 in the top corner.
- Ask students to turn and talk to a partner about what they notice about the numbers. Provide the sentence frame, “I notice ________.”