In an early childhood lesson series on addition, after modeling with cubes of two colors, what should be the next step for the students?

In an early childhood lesson series on addition, after modeling with cubes of two colors, what should be the next step for the students?

• A. The student would model the algebraic expression with cubes
• B. The student would write the algebraic expression
• C. The student would solve the equation using a calculator
• D. The student would create a story problem

Answer: (B)

Translating a concrete model into a symbolic expression helps students connect what they manipulated with written math. After using two colors of cubes to model addition, the next step is to write the expression that represents the total. For example, if the model shows two cubes of one color and two of the other, the total can be written as 2 + 2, which equals 4. This step reinforces that addition combines quantities and that numbers stand for groups of objects, creating a bridge to more abstract notation. It sets up future work with symbols and number sentences, rather than jumping straight to tools like calculators. Creating a story problem can come later as another way to apply the same idea.

Translating a concrete model into a symbolic expression helps students connect what they manipulated with written math. After using two colors of cubes to model addition, the next step is to write the expression that represents the total. For example, if the model shows two cubes of one color and two of the other, the total can be written as 2 + 2, which equals 4. This step reinforces that addition combines quantities and that numbers stand for groups of objects, creating a bridge to more abstract notation. It sets up future work with symbols and number sentences, rather than jumping straight to tools like calculators. Creating a story problem can come later as another way to apply the same idea.