Ghana curriculum lesson note

SHS 1 Additional Mathematics 2nd Semester Week 6 Lesson Plan

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Weekly Learning Plan
Subject	Additional Mathematics	Week	6
Duration	60 minutes	Form	SHS 1
Strand	Geometric Reasoning and Measurement	Sub-Strand	Measurement of Triangles
Learning Outcome(s)	1.2.2.LO.1 - Describe diagrammatically and algebraically ways of representing problems involving angles of elevation and depression and solve related word problems. 1.2.2.LO.2 - Identify values of the special angles Co in degrees and radians and solve pa problems relating to the to coordinates of the unit circle. ap id
Content Standard	1.2.2.CS.1 - Demonstrate understanding of the measurement of triangles and radians
Learning Indicator(s)	1.2.2.LI.1 - Recall basic trigonometric ratios and use the knowledge to solve problems triangles. 1.2.2.LI.2 - the unit circle to determine the geometrical and functional values including special angles.
Lesson Focus	Recall basic trigonometric ratios and use the knowledge to solve problems triangles.
Previous Knowledge	Learners recall related ideas, vocabulary or experiences from earlier lessons and everyday contexts.
Lesson Objective(s)	Describe the key idea in: Recall basic trigonometric ratios and use the knowledge to solve problems triangles. Apply the idea through guided and independent learning activities. Demonstrate understanding through oral responses, written work or practical performance.
Essential Question(s)	What prior mathematical ideas are needed for Recall basic trigonometric ratios and use the knowledge to solve problems triangles; the unit circle to determine the geometrical and functional values including special angles? How can Recall basic trigonometric ratios and use the knowledge to solve problems triangles; the unit circle to determine the geometrical and functional values including special angles be represented, explained and checked? When is the method used in Recall basic trigonometric ratios and use the knowledge to solve problems triangles; the unit circle to determine the geometrical and functional values including special angles useful, and why?
Pedagogical Strategies	Diagnostic questioning Worked-example modelling Worked-example fading Think-pair-share Guided problem solving Error analysis
Teaching & Learning Resources	Whiteboard and markers Exercise books Pens/pencils Scientific calculators Mathematical set Graph sheets Ruler
Key Notes on Differentiation
Content	Use a scaffolded version of the core Recall basic trigonometric ratios and use the knowledge to solve problems triangles; the unit circle to determine the geometrical and functional values including special angles task with intermediate prompts where support is needed. Use an extension requiring generalisation, proof, a less familiar representation or application of Recall basic trigonometric ratios and use the knowledge to solve problems triangles; the unit circle to determine the geometrical and functional values including special angles for learners ready to advance.
Process	Use worked-example fading: complete example → partially completed example → independent problem. Pair learners for mathematical explanation; the listener must restate the reasoning before agreeing or correcting.
Product	Require a complete solution with correct notation, justified steps and a check of the result. For extension work, require comparison of two methods or a statement of when the method applies.
Success Criteria	Learners use correct subject vocabulary. Learners complete the main task with reasonable accuracy. Learners explain or demonstrate how the concept applies in a new situation.
Homework	Complete mixed practice questions with full working and one short explanation of method.

Lesson Activities
Stage	Teacher Activity	Learner Activity	Assessment / DoK
Starter10 minutes	Write a short problem on measurement of triangles and ask learners to suggest the first step before solving.	Share prior knowledge, listen to peers and record the lesson question in their notebooks.	Not provided.
Activity 115 minutes	Model one worked example on measurement of triangles, explaining the rule, notation and reason for each step.	Follow the worked example, ask questions and record the method clearly.	Ask learners to name the rule used and explain why it applies.
Activity 220 minutes	Guide pairs to solve two graded questions on measurement of triangles and compare their methods.	Solve the paired questions, compare answers and correct errors with reasons.	Check working steps, notation, accuracy and correction of errors.
Activity 310 minutes	Give an unfamiliar problem on measurement of triangles for independent solution and justification.	Solve independently and write a short justification for the method used.	Mark the independent task for correct method, final answer and explanation.

Lesson Closure

Summarise measurement of triangles and correct one common misconception using learner examples. State one thing learned and complete the exit response.

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