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# Reasoning and Convincing at KS1 - Primary Teachers

### I Like ...

### Two Numbers Under the Microscope

### How Odd

### A Bag of Marbles

### Wallpaper

### Lots of Lollies

### If the World Were a Village

### Poly Plug Rectangles

### In the Playground

### Less Is More

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It's quite hard to pin down what 'reasoning' looks like. At KS1 we're looking for good 'because' statements. And if there are two or more which make a chain, that's progress.

This collection is one of our Primary Curriculum collections - tasks that are grouped by topic.

Age 5 to 7

Challenge Level

Mr Gilderdale is playing a game with his class. What rule might he have chosen? How would you test your idea?

Age 5 to 7

Challenge Level

This investigates one particular property of number by looking closely at an example of adding two odd numbers together.

Age 5 to 7

Challenge Level

This problem challenges you to find out how many odd numbers there are between pairs of numbers. Can you find a pair of numbers that has four odds between them?

Age 5 to 7

Challenge Level

Use the information to describe these marbles. What colours must be on marbles that sparkle when rolling but are dark inside?

Age 5 to 7

Challenge Level

These pieces of wallpaper need to be ordered from smallest to largest. Can you find a way to do it?

Age 5 to 7

Challenge Level

Frances and Rishi were given a bag of lollies. They shared them out evenly and had one left over. How many lollies could there have been in the bag?

Age 5 to 11

Challenge Level

This activity is based on data in the book 'If the World Were a Village'. How will you represent your chosen data for maximum effect?

Age 5 to 11

Challenge Level

The computer has made a rectangle and will tell you the number of spots it uses in total. Can you find out where the rectangle is?

Age 5 to 11

Challenge Level

What can you say about the child who will be first on the playground tomorrow morning at breaktime in your school?

Age 7 to 11

Challenge Level

Use your knowledge of place value to try to win this game. How will you maximise your score?