Lesson Objective
To find the area of shapes
Steps to Success
1. Count centimetres squared
2. Area= Length x Width
  • Add zeros
3. Two rectangles
  • Area of A + Area of B
4. Missing measurement
  • Split into rectangles
  • Find missing side
Notes

  • Ensure MA are confident with column addition to add compound shapes.
Starter (10 mins)

  • Check self assessment (PP65M.7.1-Slide 2)
Introduce problems and discuss strategies (PP65M.7.1-Slide 3).

Talk Time (Pairs organised by ability)
Partners work together to solve problems. If finished, learn times table. LA concentrate on number bonds, times tables, targets or work with support in a pair or support from teacher.

Go through workings and answers.
Main (25 mins)
Review prior learning (PP65M.7.1-Slide 4). Watch the final part of Scene 06- from 3:48- again (PP65M.7.1-Slide 5). Discuss not just finding the perimeter of the hole in the solar panel but also the area of panel needed in order to communicate with Earth.

Look at a problem and discuss (PP65M.7.1-Slide 6). Start from simple area and model measuring area in a rectangle by counting squares of one centimetre in width and length. Explain that is why we measure area in squared centimetres (PP65M.7.1-Slide 7). Repeat for examples, including half squares (PP65M.7.1-Slides 8-9). Set Group A off if suitable. (PP65M.7.1-Slides 10-11)

Establish a quicker method of counting squares by multiplying columns and rows and introduce the formula Area= Length x Width, repeat and add actions e.g. hold a hand out in front with palm facing front for area, hand moves horizontal for length, cross hands for multiply and hand goes vertical for width. (PP65M.7.1-Slides 12-14)

Talk Time (Pairs)
Remind how to use multiplication square and then learners test each other using the square. (PP65M.7.1-Slides 15-16)

Look at example to find area within times tables for mm, cm and m and also, if suitable, those with multiples of tens, stressing the getting rid of zeros and then adding zeros to answer shortcut (PP65M.7.1-Slides 17-19). Set Group B off if suitable (PP65M.7.1-Slides 20-21).

Move on to compound shapes modelling finding the area of two rectangles and then adding (PP65M.7.1-Slide 22). Extend, if suitable, to a missing side problem involving subtraction (PP65M.7.1-Slides 23-25).

Talk Time (Pairs organised by ability)
Learners choose or are told which calculations to do. Learners invent own if finished. Teacher or learners model answers, assessing learners if needed. (PP65M.7.1-Slides 26-27)

Introduce the steps to success and activities for Group C & D. Highlight any tricky questions, clues and explain any extra work/extension if they finish. (PP65M.7.1-Slides 28-30)
Groups (20 mins)
LA (Group A)
Find the area of shapes counting squares (PC65M.7.1 Section A).
Ext – Find the area of shapes counting squares and half squares (PC65M.7.1 Section B).
LMA (Group B)
Find the area of shapes calculating Length x Width (PC65M.7.2 & PC65M.4.1).
Ext – Find the area of shapes calculting Length x Width with multiples of 10 (PC65M.7.3).
MA (Group C)
Find the area of compound shapes calculating Length x Width for two identified shapes and adding (PC65M.7.4 & PC65M.4.1 ).
Ext – Find the area of compound shapes finding a missing side (PC65M.7.5 Section A).
HA (Group D)
Find the area of compound shapes using subtraction to find a missing side and then calculating areas and adding. (PC65M.7.5 Section A).
Ext – Model splitting up compound shapes and then using addition and subtraction to find missing sides of rectangles (PP65M.7.1-Slides 31-32) with learners having a go (PC65M.7.5 Sections B & C).
Plenary (5 mins)
Recap original problem with learners taking part (PP65M.7.1-Slide 33)

  • Self assessment (PP65M.7.1-Slide 34)

Feedback Group
 HA
  • Challenge with increased complexity of shapes (PC65M.6.5)
Assessment Group
 HA
  • Support with identifying rectangles in composite shapes and then missing measurements.
  • Move on to composite shapes including 3 rectangles.
Marking Group
MA
  • Challenge with missing measurements (PC65M.7.5 Section A)
Investigation Option
MA
  • Problem solving – find the missing measurement (PC65M.7.6) or solve a problem involving area and perimeter (PC65M.7.7)- NRICH Through the Window
IT Option
Resources

VAK
Focus:
Visual
Visual
Use of animation, times table grid, rectangles and colours in vizualising area.
Auditory
Repetition of “Area=Length x Width”. Discussion in talk time.
Kinaesthetic
Add actions such as holding a hand out in front with palm facing front for area, hand moving horizontal for length, crossing hands for multiply and hand going vertical for width. Talk time for learners to have a go.