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Reading bar charts LO: to solve a problem by organising and interpreting data in bar charts with intervals in ones and twos.

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**Look at the way a bar chart is constructed**

Look at the way a bar chart is constructed. Can you name its different parts? What goes here? What is this called? What is this? What do we call this?

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**A bar chart always has a title.**

Vertical axis (y). Always labelled and numbered. The height of the bars show how many of something was scored/recorded. Horizontal axis (x). Always labelled.

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**Can you read the answers?**

What does this bar chart show? How many children were surveyed? Which is the favourite flavour? Which is the least liked? What intervals are used on the y axis? What intervals could you use if twice as many children were surveyed? Can you read the answers? Favourite Crisps 8 7 6 5 Number of children 4 3 2 1 Salt and vinegar Cheese and onion Prawn cocktail Ready salted Bacon Worcester sauce Barbeque Flavours

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**How can you collect the information needed to construct a bar chart?**

By making a tally chart first!

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**Flavour Tally Salt and vinegar Cheese and onion Prawn cocktail**

Ready salted Bacon Worcester sauce Barbeque Insert any other flavours here

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Tables 1 and 2: Working in table groups, survey all the children on your tables using the tally chart template. Find out THEIR favourite crisps. Then working in pairs, construct a bar chart showing the favourite crisps in our class. With support

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Tables 3 and 4: Working in threes, shuffle and then deal 30 Pokémon cards. Sort into card types. Fill in the tally chart and draw a bar chart showing card types in a typical deal.

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**Pokémon card tally sheet**

Card type Tally Shiny cards Energy cards Character cards Trainer cards

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Table 5: Working in pairs, deal out 25 Jackie Chan cards and sort them into different types. Fill in the tally chart and create a bar chart to show card types in a typical deal.

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**Jackie Chan Tally Sheet**

Card type Tally

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**A Tabitha Mellor production**

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Narnia Bar Charts LO: to solve a problem by organising and interpreting data in bar charts.

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