Reach for the Star

Calculator fluency and accuracy · Optional extension

L105 · Allow 10–15 minutes for learners ready to move on. Answers are available after an attempt.

Stretch

Find the value of 250×1.035⁴ to the nearest penny.

Reveal a worked check after attempting

Approximately £286.88.

Deep challenge

A result is 0.00048372. Round to three significant figures and explain the first significant digit.

Reveal a worked check after attempting

0.000484; the first non-zero digit 4 begins the significant figures.

Recall & Review: feedback and extension integration

Lesson L105: Calculator fluency and accuracy

Objective: Use a calculator efficiently while checking magnitude, accuracy and units.

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: Find the value of 250×1.035⁴ to the nearest penny.

Deep challenge: A result is 0.00048372. Round to three significant figures and explain the first significant digit.