Reach for the Star

Unit rates and best buys · Optional extension

L015 · Allow 10–15 minutes for learners ready to move on. Answers are available after an attempt.

Stretch

A 750 g pack costs £2.40 and a 1.2 kg pack costs £3.60. Which is better value per kg?

Reveal a worked check after attempting

£3.20/kg versus £3.00/kg, so 1.2 kg pack.

Deep challenge

A 20% discount applies to the 750 g pack. Does the best buy change?

Reveal a worked check after attempting

750 g pack becomes £1.92, or £2.56/kg; it is now cheaper per kg.

Recall & Review: feedback and extension integration

Lesson L015: Unit rates and best buys

Objective: Compare prices using a common unit. Interpret the best buy in terms of cost, quantity needed and waste.

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 a suitable representation or multiplier and kept the reference amount clear.

Even Better If (EBI)

I will state the whole/part, show each operation and check that the size of my answer is reasonable.

Stretch and deep challenge

Stretch: A 750 g pack costs £2.40 and a 1.2 kg pack costs £3.60. Which is better value per kg?

Deep challenge: A 20% discount applies to the 750 g pack. Does the best buy change?