TEKS Math 6.10.B

Math6th Grade

The Standard

determine if the given value(s) make(s) one-variable, one-step equations or inequalities true

Texas Essential Knowledge and Skills for Mathematics

Teacher's field guide

What Students Need to Do: Students substitute each given number for the variable, then simplify both sides. They decide whether the resulting equation or inequality is true or false.
What Mastery Looks Like: A student writes the substituted expression, computes accurately, and labels each value true or false. The student explains the decision by comparing both sides.
Common Misconceptions: Students may solve for the variable instead of checking the provided value. They may confuse < with ≤ or > with ≥. Negative values and multiplication beside a variable can also cause errors.
How to Assess It: Exit ticket: Test x = 4 in 2x + 3 = 11 and x = 5 in 3x - 2 < 12. Show each substitution and write true or false.

Lesson moves

Place variable, operation, number, and relation cards on a mat, then replace the variable with a value card and evaluate both sides.
Students answer the prompt, “How does substitution prove whether x = 6 fits 2x + 1 = 13?” in two written sentences.
Play True or False Relay: teams substitute a posted value, calculate, and place the card under the correct heading.
Each arcade game costs $3, so use 3g ≤ 20 to test whether 4, 5, or 6 games stay within a $20 budget.

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