Voiceover:
In a world without maths,a land where people forgot, who will save the day?
Mrs Barker:
You know what I鈥檝e got in here my lovelies, I鈥檝e gotlots of yummy dog treats especially for you. Now, now,there鈥檚 plenty for all of you.
Calm down there鈥檚 no need for that鈥h, oh dear!Help, help! Somebody help!
Policeman:
Can I help madam?
Mrs Barker:
No, not you.I need鈥ivider Girl.
Divider Girl, thank goodness you鈥檙e here. I need help.I鈥檝e bought fifteen treats for my fluffy little angelsbut I don鈥檛 know how many to give them.
If they don鈥檛 all get the same, they get a bit cranky.
Narrator:
Can Divider Girl save Mrs Barker and work out how many treats the dogs get?Divider Girl? That鈥檚 right, division time.Remember it鈥檚 just repeated subtraction, keep cool.Okay, fifteen doggy treats, how many grumpy dogs?
Mrs Barker:
Five lovely little doggywoggywoooos.
Narrator:
So fifteen treats to share equally between five dogs.This can be written as fifteen divided by five.
Ready Divider Girl? Go.Fifteen minus five takes us to ten.
Mrs Barker:
There you go my angels.
Narrator:
Each dog gets one treat, and there are ten treats left.Ten minus five takes us to five, good.
Now each dog gets two treats and there are five treats left.
Mrs Barker:
Keep going Divider Girl.
Narrator:
Five minus five takes us to zero, phew.The dogs get three treats each and there are zero left.
Mrs Barker:
There you go Pom Pom, Mr Fluff鈥ow don鈥檛 eat them all at once.
Narrator:
So fifteen divided by five equals three.Well done Divider Girl, you鈥檝e saved the day.
Mrs Barker:
Hold on, oh no, I鈥檝e found another doggy treat!
Video summary
Mrs Barker has just bought some yummy treats for her dogs and they can鈥檛 wait to eat them.
There is just one problem, if the dogs don鈥檛 get the same number of treats each, they get seriously cranky.
This sounds like a job for Divider Girl. Can Divider Girl use sharing and repeated subtraction to help Mrs Barker share the treats out equally?
How might her number line help? Will they manage to calm the dogs and save Mrs Barker from her position of peril?
This clip is from the series A World Without Maths.
Teacher Notes
You could get your class to continue their learning by solving real life division problems.
They could use objects, pictures or arrays to share out amounts equally.
Some children might use a number line to do repeated subtraction to divide.
The problems could be based on the story they have watched.
For example: Can you help Mrs Barker feed her rabbits? There are 20 carrots and 5 pet rabbits. They must all get the same amount or they will not be happy!
How many carrots will each rabbit get? What method will you use to solve the problem? How might you show this in a picture? As a calculation?
You could extend learning by getting pupils to begin to use their multiplication facts to work out the answers, asking 鈥楬ow many 5s make 20?鈥 or 'What is 20 divided into 5?鈥
Children could mimic the gesture Divider Girl makes with her arms when attempting division problems.
Gestures can help with recalling maths terms, linking them to the relevant symbol and making student thinking more visible.
This clip will be relevant for teaching Maths at KS1 and KS2 in England and Wales, and First and Second Level in Scotland.
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