Friday Halves Review

Overview

In this fifth lesson of the ten-lesson unit Sharing Halves and Quarters, students revisit what a half means: two equal parts. They apply this idea to sharing, folding, collections and measured strips, then explain how they know their answers are fair and equal.

Learning intentions

• WALT recognise, make and explain halves in different situations.
• WALT check that two parts are equal.
• WALT use mathematical words, drawings and objects to explain our thinking.

Success criteria

• I can identify a half.
• I can make two equal parts.
• I can find half of a collection.
• I can explain how I know my answer is correct.

Curriculum links

• Mathematics and Statistics — Number: recognising and representing equal parts of a whole and equal sharing.
• Mathematics and Statistics — Measurement: comparing and sequencing lengths.
• Mathsteasers: developing higher-order thinking through explaining, checking and justifying mathematical ideas.
• Mathematical communication and participation: using objects, drawings, words and talk to share mathematical thinking.

Lesson structure (60 minutes)

1. 0–8 min · Hook and review. Display the question “Is this a half?” with a picture of a shape divided into two unequal parts using the hook and review slides. Ask students to turn and talk: “What makes a half?” Gather responses and model the key idea that halves are two parts that are equal in amount, size or length. Students show thumbs up, sideways or down for several quick examples and explain one choice.

2. 8–15 min · Model the stations. Introduce four stations using the station instruction slides. Demonstrate sharing counters one at a time into two groups, folding a paper shape to check equal parts, pairing objects to find half of a collection, and comparing strips by placing them together. Model the sentence stem: “I know it is half because…” Students repeat the stem and practise explaining one example to a partner.

3. 15–47 min · Rotating station investigation. Organise 20 students into four groups of five. Groups spend approximately eight minutes at each station, with one minute to tidy and rotate. Use a visual timer and station icons. Students record a drawing, answer or short explanation on the halves station recording sheet.

• Fair sharing: Students share counters, buttons or toy foods equally between two plates. Include collections that can and cannot be shared fairly. Students decide whether each group shows half and explain any leftovers.
• Folding shapes: Students fold circles, squares and rectangles in different ways, open them and trace the fold. They identify whether the two parts are equal, then shade one half.
• Half of collections: Students count small collections of 4, 6, 8 or 10 objects, make two equal groups and state half of the collection. They may draw the groups on the recording sheet.
• Sequencing measured strips: Students compare paper strips by matching their ends, identify the longer and shorter lengths, and find a strip that is half the length of another where possible. They sequence the strips from shortest to longest and explain how they checked.

Confer with individuals during rotations. Ask, “How did you make the parts equal?”, “What did you check?” and “Can you show your answer another way?”

4. 47–53 min · Revisit and explain. Bring students back together and display two station examples using the share-and-explain discussion slides. Invite pairs to explain one answer using objects, a drawing or words. Compare a correct half with a near miss, such as two unequal groups, and ask students to identify and repair the mistake.

5. 53–58 min · Individual check. Give each student a small collection of counters or draw six dots on the board. Students independently make or draw two equal groups, circle one half and complete orally or on the worksheet: “Half of ___ is ___ because…” Include a shape divided into unequal parts for students to decide whether it shows a half.

6. 58–60 min · Exit reflection. Display the final reflection prompt in the plenary and exit prompt slide: “A half is ____. I can check it by ____.” Students share their response with a partner, then place their worksheet in the collection tray or tell the teacher their answer orally.

Resources

• the halves review and station deck
• the halves station recording sheet
• Counters, buttons or small classroom objects
• Two plates, hoops or paper circles for sharing
• Paper circles, squares and rectangles for folding
• Paper strips of different lengths
• Pencils, crayons and scissors
• Visual timer and station signs with icons
• Four table tubs labelled with station names

Assessment

• Listen for students using “equal”, “same amount”, “two parts” and “half” accurately during the hook and stations.
• Observe whether students create two equal groups, fold or match shapes accurately, and check strip lengths rather than guessing.
• Review the recording sheet and individual check. Note students who can identify a half but cannot yet make or explain one, and students ready for a more open-ended challenge.

Differentiation

• Revisit the station most needed in a teacher-led group, using concrete materials and fewer objects before increasing the number.
• Provide a visual checklist: “Make two groups; check they are equal; find one group; explain.” Use colour-coding or hoops to show the two parts.
• Offer dyslexia-friendly station cards with one instruction per line, clear icons, uncluttered print and read-aloud support. Accept pointing, drawing, showing with objects or an oral explanation instead of extended writing.
• Conference individually with learners who need support. Pair students thoughtfully so partners model language without completing the task for one another.
• For advanced learners, ask them to design a “half challenge” for a partner using a collection, shape or length. They must predict the answer and justify why it is correct.

Extension

• Students create two examples: one that is a half and one that is not a half, then challenge a partner to identify and explain the difference.
• Students find more than one way to fold a shape into two equal parts and explain how they know both folds make halves.