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| | * So far in maths, you've encountered a number of symbols: +, - ... | | * So far in maths, you've encountered a number of symbols: +, - ... |
| | ** Can you tell me some more symbols you already know (e.g. = x and /)? | | ** Can you tell me some more symbols you already know (e.g. = x and /)? |
| - | * Today we're going to learn about a symbol called π. Nothing to be frightened of -- it's just a number. | + | * Today we're going to learn about a symbol called π. Nothing to be frightened of -- it's just a number. And we use it when we are calculating various values of circles. |
| | + | * And in order to introduce this number, we're going to do a short practical. |
| | + | * Draw a circle on the IWB. |
| | + | * Can anyone tell me what we call the distance around the outside of the circle? ([[perimeter]], [[circumference]]) |
| | + | * Can anyone tell me what we call the line from the centre of the circle to the outside? ([[radius]]) |
| | + | * And can anyone tell me what we call the line that goes through the centre and touches the edge at both ends? ([[diameter]]) |
| | + | |
| | * Main worksheet: p.52 of [[Kroll and Mills: 'KS3 Measures, Shape and Space -- Year 9']] | | * Main worksheet: p.52 of [[Kroll and Mills: 'KS3 Measures, Shape and Space -- Year 9']] |
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Heathside Schools Mathematics Department Lesson Plan Outline
| Teacher: Mr G Wilson
| Class: 8A3
| Date: 2-Dec-09
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| Module/Topic: KS3: Perimeter, Area and Volume / Circumference of a Circle
| Room: T3
| Lesson: 13:55-14:45
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Lesson Objectives (including AFL)
- Review homework -- help them to add and subtract areas.
- Learn and apply the formula for the Circumference of a circle.
| Success Criteria
- Everyone able to remember and apply the formula for the circumference of a circle.
- Everyone able to write π and know its approximate value.
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Class Management Objectives
- Continue with Emma Bray's strategy to keep them largely quiet and on task.
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| Lesson Context (including AFL)
| Prior Pupil Knowledge
- Area of various quadrilaterals
- Perimeter
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Resources/Equipment
- Whiteboard pens
- IWB pen
- 35 copies of Starter worksheets
- 35 copies of main worksheet
- 15 copies of Extension
- 35 copies of homework sheet
- Strips of graph paper for estimating π.
- This lesson plan (two hard copies)
- Whiteboard rubber
- Spare calculators
- Mega-compasses
- List of star students on PowerPoint
- Two examples from Monday's homework on ActivStudio flipchart
| Provision for EAL/SEN/G&T
|
Health and Safety
- No abnormal risks -- today will be just worksheet and whiteboard.
- Students may need to use compasses (for circle construction).
| Named Students
- Stuart Hooker (ASD)
- Paige Barrow (BESD)
- John Sadikoglu (SLD)
- Freddie Thompson (BESD)
- Jake Gaywood (SLD)
- Curtis Hillier (BESD)
- Reece Lowden (Moderate LD)
- Daniel Quest (Language)
- Emily Ross (SLD)
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Starter
- Review specific homework problem about adding and subtracting areas.
- Some of the shapes were a little more complicated than the quadrilaterals we have been looking at.
- Break them down into shapes you know the area of.
- Area of the whole shape is the sum of the areas of the parts.
- Where you are asked for the area of a shaded part, you will have to do a subtraction.
- Area of the shaded part is the area of the whole shape minus the area of the unshaded part.
- Sometimes they may not directly give you the length of a side: you may have to work it out.
- Issue worksheet.
- You can use a calculator if you wish.
- 5 minutes, starting now.
- Take the Register while they are doing it.
- Review answers.
- Show list star students for this and previous homework. Issue merit stickers at end.
|
Development activities (including AFL)
- Today we're going to meet a new symbol.
- So far in maths, you've encountered a number of symbols: +, - ...
- Can you tell me some more symbols you already know (e.g. = x and /)?
- Today we're going to learn about a symbol called π. Nothing to be frightened of -- it's just a number. And we use it when we are calculating various values of circles.
- And in order to introduce this number, we're going to do a short practical.
- Draw a circle on the IWB.
- Can anyone tell me what we call the distance around the outside of the circle? (perimeter, circumference)
- Can anyone tell me what we call the line from the centre of the circle to the outside? (radius)
- And can anyone tell me what we call the line that goes through the centre and touches the edge at both ends? (diameter)
|
Plenary / AFL
- "If, next lesson, I show you a worksheet of circles of various radius or diameter, how confident will you be that you can calculate the circumference? Show me the R-Y-G from your diaries."
- "Those of you showing me yellow, can you tell me what the difficulty is?"
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| Cross-curricular links (Literacy, Numeracy, Citizenship, Spirituality, ICT)
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| Homework
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