Understand
Read the worked example. Explain why subtracting 5 from each side of 3x + 5 = 20 preserves equality.
TEACHER LEARNING MODULE · 10–15 MINUTES · DRAFT
Explain
the balance.
Practice explaining the mathematics and choosing an instructional response. Work on paper; nothing is uploaded or recorded.
Rehearse
Solve 4x + 3 = 19 aloud. Name each operation and check x = 4 in the original equation.
Respond
For the illustrative error 3x + 5 = 20 → 3x = 25, write a question that reveals the reasoning and a response that models subtraction on both sides.
Reflect
What explanation will you use in your next lesson? What part needs further review?
A useful explanation names the same operation on both sides, treats 3x as multiplication, and verifies the solution by substitution. A useful response asks about the operation before supplying a correction.