Grade 2 · Number
Change in Quantity: Pictorial and Symbolic
Grade 2 formalizes the change-in-quantity work from Grade 1 by introducing pictorial and symbolic representations together. The equation 6 + n = 10 is now written formally, and the ten-frame or hundred chart makes the unknown value visible. A student who can show 6 + n = 10 on a ten-frame (6 filled, 4 empty: n = 4) and write the equation has genuinely connected the visual model to the symbolic notation. This bidirectional connection is the foundation of algebraic thinking.
LESSON VIDEO
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Lesson video
A short walkthrough to play in class or assign for flipped/at-home viewing.
WHAT STUDENTS WILL LEARN
✓Numerically describe a change in quantity using equations and visual models
✓Use ten-frames and hundred charts to visualize unknown addends: 6 + n = 10
✓Record and solve change problems symbolically, using + , -, and =
✓Connect pictorial models (ten-frame, number line) to symbolic equations
✓Solve all three change problem structures: unknown result, change, and start