Angle Spotting

Overview

In this lesson, students learn what angles are and how to tell whether an angle is smaller or bigger than a right angle. They use real-world objects and quick drawings to classify angles and describe their features as turns.

Learning intentions

Students will:

• recognise right angles in shapes and everyday items
• identify angles as a property of a shape or a description of a turn
• compare angles as greater than or less than a right angle
• practise estimating and checking using a right-angle corner tool (cartwheel/right-angle marker)

Success criteria

Students can:

• point to a right angle and describe it as a “corner turn”
• sort examples into “right angle” and “not a right angle”
• say whether an angle is “bigger than a right angle” or “smaller than a right angle”
• explain how they checked their answer using a corner tool or drawing

Curriculum links

• Geometry – properties of shapes (KS1/early KS2 statutory focus): recognise right angles and identify whether angles are greater than or less than a right angle
• Geometry – properties of shapes: recognise angles as a property of shape or a description of a turn

Lesson structure (70 minutes)

1. 0–7 min · Warm-up: Corner Talk. Teacher shows two pictures of corners (one right-angled, one not) and asks students which feels like a “square corner” and why. Students share ideas in pairs and then whole-class.

2. 7–15 min · Mini-lesson: What is an angle? Teacher uses the board to draw a simple L-shape and a “slanted” corner, explaining that an angle is made where two straight lines meet, and it describes a turn. Students point to the meeting point and trace the lines with a finger.

3. 15–25 min · Direct teaching: Right angles first. Teacher introduces a right-angle marker (a small paper corner) and demonstrates how to line it up in a corner to check. Students use the marker on three teacher-held shape cards and say: “This is right” or “This is not right”, holding up 1–2 fingers to show confidence.

4. 25–40 min · Guided practice: Smaller vs bigger. Teacher draws one angle clearly smaller than a right angle and one clearly bigger, labelling the right angle for reference. Students practise comparing with their marker: they place the marker at the vertex and decide “smaller than a right angle” or “bigger than a right angle”, then record with ticks and words on mini-whiteboards.

5. 40–55 min · Real-world hunt: Angle Sort. Teacher sets up stations with everyday items/photos showing corners (e.g., books, doors, windows, floor tiles, classroom posters, traffic signs or road markings). Students in groups rotate station to station to sort corners into three categories on a sheet: “Right angle”, “Smaller than right”, “Bigger than right”. Each student must choose at least one example and be ready to justify their choice.

6. 55–62 min · Share and challenge. Teacher calls for volunteers from each group to present one item and explain how they checked. Teacher probes with questions like: “Is it the same as the right angle marker, or larger/smaller?” Students respond and revise any mis-sorts.

7. 62–70 min · Exit ticket: Draw and label. Teacher gives each student an exit ticket with two blank corners to draw from a prompt: one they should draw smaller than a right angle, one bigger than a right angle, plus a space to write “smaller/bigger” and one sentence about how they checked. Students complete independently.

Resources

• Right-angle corner tools (paper corner markers or corner templates) for each student
• Mini-whiteboards and pens (or paper with pencils)
• Shape cards showing angles (including clear right angles and non-right angles)
• Real-world station items or printed photos with corners (mixed difficulty)
• Sorting sheet with three headings: right angle / smaller than right / bigger than right
• Teacher visual slides/board drawings of angle comparisons
• Exit tickets with two prompts and writing space
• Timer for rotations and share discussion

Assessment

• Formative checks during warm-up: correct identification of a “square corner”
• Guided practice monitoring: look for correct use of the right-angle marker and accurate wording (“smaller/bigger than right”)
• Exit ticket: students draw and label an angle smaller than right and an angle bigger than right, with a brief justification sentence

Differentiation

• Support: provide sentence starters such as “I know it is a right angle because…” and “It is smaller than a right angle because…”
• Support: offer a guided “checklist” for using the marker (meet at the vertex, lines match the sides, read the result)
• Extension: ask students to find two angles in an item—one smaller and one bigger—and sort them with a written explanation
• EAL/SEN considerations: allow pointing and using the marker as the primary response before writing; use visual prompts and consistent vocabulary across the lesson