MEASUREMENTS

Approximation and errors.

By the end of the lesson, the learner should be able to:
-Approximate quantities in measurements in different situations.
-Determine errors using estimations and actual measurements.
-Appreciate working out problems on errors approximation.

-Carrying out activities of measurements of different quantities such as length, area, volume, capacity and mass using arbitrary units.
-Estimate and measure different quantities using appropriate instruments.
-Compare estimates and the actual measurements and determine the error.

-How do we estimate measurements of different quantities?

-Mentors Mathematics learners book grade 9 page 153-155.
-Different paper cut outs on currencies.
-Black board illustrations.
-Receipts.

-Written exercise. -Oral question.

MEASUREMENTS

Approximation and errors.

By the end of the lesson, the learner should be able to:
-Approximate quantities in measurements in different situations.
-Determine errors using estimations and actual measurements.
-Appreciate working out problems on errors approximation.

-Carrying out activities of measurements of different quantities such as length, area, volume, capacity and mass using arbitrary units.
-Estimate and measure different quantities using appropriate instruments.
-Compare estimates and the actual measurements and determine the error.

-How do we estimate measurements of different quantities?

-Mentors Mathematics learners book grade 9 page 153-155.
-Different paper cut outs on currencies.
-Black board illustrations.
-Receipts.

-Written exercise. -Oral question.

MEASUREMENTS

Money

By the end of the lesson, the learner should be able to:
-Determine percentage errors using actual measurements of quantities.
-Work out problems on percentage errors.
-Appreciate approximations and errors in real life situations.

-Work out the percentage error from the estimated and the actual measurements.
-Work out errors using digital devices or other resources and relate to consumer awareness.

-How do we estimate measurements of different quantities?

-Mentors Mathematics learners book grade 9 page 158-164.
-Different paper cut outs on currencies.
-Black board illustrations.
-Receipts.

-Written exercise. -Oral question.

MEASUREMENTS

Money

By the end of the lesson, the learner should be able to:
-Determine percentage errors using actual measurements of quantities.
-Work out problems on percentage errors.
-Appreciate approximations and errors in real life situations.

-Work out the percentage error from the estimated and the actual measurements.
-Work out errors using digital devices or other resources and relate to consumer awareness.

-How do we estimate measurements of different quantities?

-Mentors Mathematics learners book grade 9 page 158-164.
-Different paper cut outs on currencies.
-Black board illustrations.
-Receipts.

-Written exercise. -Oral question.

GEOMETRY

Co-ordinates and graphs.

By the end of the lesson, the learner should be able to:
-Identify the vertical and horizontal axes.
-Plotting a straight line Y=Mx+C
-Plot out points on a Cartesian plane.
-Show genuine interest in plotting points on a Cartesian plot.

In groups or pairs, learners are guided to;
-Identify vertical(y-axis) and horizontal(x-axis) on the Cartesian plane.
-Plot out points on a Cartesian plane to make a straight line.
-Locate the points (y coordinates and x-coordinates on a Cartesian plane).

-How do we plot on a Cartesian plane?

-Mentors Mathematics learners book grade 9 page 166-168.
-Different paper cut outs on currencies.
-Black board illustrations.
-A Cartesian plane.
-A geometrical set.
-A Pencil

-Written exercise. -Oral question.

GEOMETRY

Co-ordinates and graphs

By the end of the lesson, the learner should be able to:
-Plotting parallel lines on a Cartesian plane.
-Draw parallel lines on a Cartesian plane.
-Relate gradients of parallel lines.
-Appreciate drawing parallel lines and relating their gradients.
Note;Gradient for parallel lines are equal.

-Plotting parallel lines on a Cartesian plane by devising table of values.
-Draw parallel lines on a Cartesian plane from the table of values.
-Relate gradients of parallel lines.

-How is gradient of parallel lines related?

-Mentors Mathematics learners book grade 9 page 168-172.
-Different paper cut outs on currencies.
-Black board illustrations.
-A Cartesian plane.
-A geometrical set.
-A Pencil

-Written exercise. -Oral question.

GEOMETRY

Co-ordinates and graphs

By the end of the lesson, the learner should be able to:
-Plotting parallel lines on a Cartesian plane.
-Draw parallel lines on a Cartesian plane.
-Relate gradients of parallel lines.
-Appreciate drawing parallel lines and relating their gradients.
Note;Gradient for parallel lines are equal.

-Plotting parallel lines on a Cartesian plane by devising table of values.
-Draw parallel lines on a Cartesian plane from the table of values.
-Relate gradients of parallel lines.

-How is gradient of parallel lines related?

-Mentors Mathematics learners book grade 9 page 168-172.
-Different paper cut outs on currencies.
-Black board illustrations.
-A Cartesian plane.
-A geometrical set.
-A Pencil

-Written exercise. -Oral question.

GEOMETRY

Co-ordinates and graphs

By the end of the lesson, the learner should be able to:
-Plotting parallel lines on a Cartesian plane.
-Draw parallel lines on a Cartesian plane.
-Relate gradients of parallel lines.
-Appreciate drawing parallel lines and relating their gradients.
Note;Gradient for parallel lines are equal.

-Plotting parallel lines on a Cartesian plane by devising table of values.
-Draw parallel lines on a Cartesian plane from the table of values.
-Relate gradients of parallel lines.

-How is gradient of parallel lines related?

-Mentors Mathematics learners book grade 9 page 168-172.
-Different paper cut outs on currencies.
-Black board illustrations.
-A Cartesian plane.
-A geometrical set.
-A Pencil

-Written exercise. -Oral question.

GEOMETRY

Co-ordinates and graphs

By the end of the lesson, the learner should be able to:
-Plotting parallel lines on a Cartesian plane.
-Draw parallel lines on a Cartesian plane.
-Relate gradients of parallel lines.
-Appreciate drawing parallel lines and relating their gradients.
Note;Gradient for parallel lines are equal.

-Plotting parallel lines on a Cartesian plane by devising table of values.
-Draw parallel lines on a Cartesian plane from the table of values.
-Relate gradients of parallel lines.

-How is gradient of parallel lines related?

-Mentors Mathematics learners book grade 9 page 168-172.
-Different paper cut outs on currencies.
-Black board illustrations.
-A Cartesian plane.
-A geometrical set.
-A Pencil

-Written exercise. -Oral question.

GEOMETRY

Co-ordinates and graphs

By the end of the lesson, the learner should be able to:
-Plotting perpendicular lines on a Cartesian plane.
-Draw perpendicular lines on a Cartesian plane.
-Relate gradients of perpendicular lines.
-Appreciate drawing perpendicular lines and relating their gradients.
Note;Gradient for perpendicular lines are M1×M2= -1.

-Plotting perpendicular lines on a Cartesian plane by devising table of values.
-Draw perpendicular lines on a Cartesian plane from the table of values.
-Relate gradients of perpendicular lines.

-How are gradient of perpendicular lines related?

-Mentors Mathematics learners book grade 9 page 172-174.
-Different paper cut outs on currencies.
-Black board illustrations.
-A Cartesian plane.
-A geometrical set.
-A Pencil

-Written exercise. -Oral question.

GEOMETRY

Scale drawing

By the end of the lesson, the learner should be able to:
Identify compass and true bearing in real life situation.
-Determine the bearing of a point from another in real life situation.
-Appreciate determining the bearing of a point in real life situation.

-Draw and discuss the compass directions and relate to the compass and true north bearings.
-Discuss and locate place from different points using bearings.
-Discuss and locate places using bearing and distance.
-Sketch and use a scale drawing to show the position of places from given points.

-How do we use scale drawing in real life situation?

-Mentors Mathematics learners book grade 9 page 180-184.
-Different paper cut outs on currencies.
-Black board illustrations.
-A Cartesian plane.
-A geometrical set.
-A Pencil

-Written exercise. -Oral question.

GEOMETRY

Scale drawing

By the end of the lesson, the learner should be able to:
Identify compass and true bearing in real life situation.
-Determine the bearing of a point from another in real life situation.
-Appreciate determining the bearing of a point in real life situation.

-Draw and discuss the compass directions and relate to the compass and true north bearings.
-Discuss and locate place from different points using bearings.
-Discuss and locate places using bearing and distance.
-Sketch and use a scale drawing to show the position of places from given points.

-How do we use scale drawing in real life situation?

-Mentors Mathematics learners book grade 9 page 180-184.
-Different paper cut outs on currencies.
-Black board illustrations.
-A Cartesian plane.
-A geometrical set.
-A Pencil

-Written exercise. -Oral question.

GEOMETRY

Scale drawing

By the end of the lesson, the learner should be able to:
Identify compass and true bearing in real life situation.
-Determine the bearing of a point from another in real life situation.
-Appreciate determining the bearing of a point in real life situation.

-Draw and discuss the compass directions and relate to the compass and true north bearings.
-Discuss and locate place from different points using bearings.
-Discuss and locate places using bearing and distance.
-Sketch and use a scale drawing to show the position of places from given points.

-How do we use scale drawing in real life situation?

-Mentors Mathematics learners book grade 9 page 180-184.
-Different paper cut outs on currencies.
-Black board illustrations.
-A Cartesian plane.
-A geometrical set.
-A Pencil

-Written exercise. -Oral question.

GEOMETRY

Scale drawing

By the end of the lesson, the learner should be able to:
Identify compass and true bearing in real life situation.
-Determine the bearing of a point from another in real life situation.
-Appreciate determining the bearing of a point in real life situation.

-Draw and discuss the compass directions and relate to the compass and true north bearings.
-Discuss and locate place from different points using bearings.
-Discuss and locate places using bearing and distance.
-Sketch and use a scale drawing to show the position of places from given points.

-How do we use scale drawing in real life situation?

-Mentors Mathematics learners book grade 9 page 180-184.
-Different paper cut outs on currencies.
-Black board illustrations.
-A Cartesian plane.
-A geometrical set.
-A Pencil

-Written exercise. -Oral question.

GEOMETRY

Scale drawing

By the end of the lesson, the learner should be able to:
Identify compass and true bearing in real life situation.
-Determine the bearing of a point from another in real life situation.
-Appreciate determining the bearing of a point in real life situation.

-Draw and discuss the compass directions and relate to the compass and true north bearings.
-Discuss and locate place from different points using bearings.
-Discuss and locate places using bearing and distance.
-Sketch and use a scale drawing to show the position of places from given points.

-How do we use scale drawing in real life situation?

-Mentors Mathematics learners book grade 9 page 180-184.
-Different paper cut outs on currencies.
-Black board illustrations.
-A Cartesian plane.
-A geometrical set.
-A Pencil

-Written exercise. -Oral question.