Grade 5 Mathematics — Term 1, Week 7

5 day-plan(s) · WeLearn Math

Grade 5 Mathematics · Term 1, Week 7 · 60 minutes

Objectives	Students will be able to: (1) know sum of angles on a straight line = 180 degrees, around a point = 360 degrees; (2) calculate missing angles; (3) solve problems.
Materials	Protractors, angle problems, worksheets.
Key vocabulary	supplementary, angles on a line, angles at a point, calculate
Engage (starter)	(10 min) "Draw a straight line with two angles. Together they make 180 degrees."
Develop (main)	(35 min) 1. Demonstrate with protractor. 2. Practice missing angle problems. 3. Apply to real-life (pie charts). 4. Game: angle puzzle cards. 5. Worksheet.
Plenary (close)	(10 min) Quick quiz: "If one angle on a line is 75 degrees, what's the other?"
Assessment	Correct calculation.
Teacher notes	Foundation for geometry proofs.

Grade 5 Mathematics · Term 1, Week 7 · 60 minutes

Objectives	Students will be able to: (1) prove angle sum of triangle = 180 degrees; (2) find missing angles; (3) classify by angles.
Materials	Paper triangles (to tear corners), protractors, worksheets.
Key vocabulary	interior angle, exterior angle, right, acute, obtuse
Engage (starter)	(10 min) "Tear the corners off a triangle - they form a straight line! So 180 degrees."
Develop (main)	(35 min) 1. Hands-on activity. 2. Practice finding missing interior angles. 3. Exterior angle = sum of two opposite interiors. 4. Word problems. 5. Worksheet.
Plenary (close)	(10 min) Triangle angle challenge.
Assessment	Correct missing angle calculations.
Teacher notes	Use algebra to solve (e.g., x + 50 + 60 = 180).

Grade 5 Mathematics · Term 1, Week 7 · 60 minutes

Objectives	Students will be able to: (1) name and classify polygons; (2) calculate sum of interior angles; (3) find each interior angle of regular polygon.
Materials	Polygon models, formula cards, worksheets.
Key vocabulary	polygon, regular, irregular, interior angle, sum
Engage (starter)	(10 min) "How many degrees in a pentagon? Formula: (n-2) x 180 degrees."
Develop (main)	(35 min) 1. Derive formula. 2. Practice for various polygons. 3. For regular polygons, divide sum by number of sides. 4. Draw and label. 5. Worksheet.
Plenary (close)	(10 min) Polygon quiz: "Sum of angles in a hexagon?"
Assessment	Correct calculation.
Teacher notes	Link to tiling patterns.

Grade 5 Mathematics · Term 1, Week 7 · 60 minutes

Objectives	Students will be able to: (1) reflect shapes across mirror lines; (2) rotate shapes (90, 180 degrees) about a point; (3) describe transformations.
Materials	Mirrors, tracing paper, grid paper, worksheets.
Key vocabulary	reflect, mirror line, rotate, centre of rotation, clockwise
Engage (starter)	(10 min) Use a mirror to see reflection. "The image is reversed."
Develop (main)	(35 min) 1. Practice reflecting on grid. 2. Rotate shapes using tracing paper. 3. Describe using language: "Rotated 90 degrees clockwise about (0,0)." 4. Create a tessellation using transformations. 5. Worksheet.
Plenary (close)	(10 min) Transformation art gallery.
Assessment	Accurate transformation.
Teacher notes	Use coordinates.

Grade 5 Mathematics · Term 1, Week 7 · 60 minutes

Objectives	Students will be able to: (1) review angles, polygons, transformations; (2) complete a geometry booklet; (3) present a geometry concept.
Materials	Booklet template, art supplies.
Key vocabulary	review
Engage (starter)	(10 min) "Choose your favourite geometry topic and make a teaching poster."
Develop (main)	(35 min) 1. Create a poster explaining a concept (e.g., angle sum, reflection). 2. Include examples and tips. 3. Present to small group. 4. Gallery walk. 5. Peer feedback.
Plenary (close)	(10 min) Best poster award.
Assessment	Poster accuracy and clarity.
Teacher notes	Consolidate.