Reach for the Star

Signed numbers · Optional extension

L001 · Allow 10–15 minutes for learners ready to move on. Answers are available after an attempt.

Stretch

Calculate −18+27−35 and check by grouping in a second way.

Reveal a worked check after attempting

−26; for example (−18+27)−35=9−35=−26.

Deep challenge

A learner claims subtracting a negative always gives a positive answer. Test the claim with a counterexample.

Reveal a worked check after attempting

False: −8−(−3)=−5, still negative.

Recall & Review: feedback and extension integration

Lesson L001: Signed numbers

Objective: Order integers; signed addition/subtraction; explain and check.

60-minute structure: 0-7 Connect & Check; 7-14 Share; 14-25 Present/model; 25-44 Apply route choice/practice; 44-52 independent exam-style check; 52-60 Recall & Review, WWW/EBI and next step.

What Went Well (WWW)

I selected an efficient numerical method, showed the key steps clearly and checked the sign, size or accuracy of my answer.

Even Better If (EBI)

I will make the place-value, sign or operation decision explicit and use estimation or an inverse calculation to check a fresh question.

Stretch and deep challenge

Stretch: Calculate −18+27−35 and check by grouping in a second way.

Deep challenge: A learner claims subtracting a negative always gives a positive answer. Test the claim with a counterexample.