A YouTube instructional video (presenters Zoe and a co-presenter) demonstrating three addition tasks to deepen and assess pupils' mastery of column addition. Problem 1 (Lower KS2): identify and explain an incorrect column-addition answer due to a missed carry. Problem 2 (Upper KS2): use six distinct digits from 1–9 to make an equation true (multiple solutions; scaffolding suggested). Problem 3 (Upper KS2): a logic/missing-number column-addition problem involving carries and trial-and-improvement. The video includes teacher-facing advice on scaffolding (cards, layout) and introducing decimals to extend the method.
Chapters
Hi, I'm Zoe and in this video we're going to look at greater depth in addition. We're going to look at three examples that will deepen pupils knowledge in addition and will also allow you to assess their mastery of key concepts.
So here's our first problem.
This is aimed at lower key stage two.
We've got a problem, an addition problem.
Using the column addition method and we've got an answer but the answer is incorrect. Pupils have got to identify and explain the mistake. Encouraging here pupils to work through the.
Problem hopefully without support.
They know we're starting with the ones column.
So we're going to have three plus nine which is equal to 12. We can see we've got two ones. We've also got a 10. The two is in the ones column but we can see our 10 missing. So when pupils add it in we.
Can see we should have had a.
One to add to the six and the two.
So this eight here should have been a nine. Hopefully people can find that and then they can explain to you why the answer is wrong and what the correct answer is.
So that is our first problem aimed.
At Lower Key Stage 2.
Our second problem aimed at Upper Key Stage 2.
Use any six digits from 1 to 9 once to make this equation true. This is the problem you would give.
Them if they needed support. You could show them this to show.
How to set it out to enable it to be that little bit less complex.
Again a discussion around what digit could.
Be here hopefully facilitates them to realize that it can only be a nine after that there are more than one correct answers for this one. So, so encouraging them to find an answer and then seeing if they could find another one.
Again giving cards out for the lower.
Pupils if they weren't quite working at this depth yet to be able to.
Move them around without worrying too much.
And try out that calculation. Another really powerful way of getting them to work with this column addition method, introducing decimals.
Our last problem again aimed at upper key stage two.
It's a bit more of a logic problem with got two missing numbers.
Now this really does help us to.
Assess their mastery with the column addition method. Starting with our ones, we've got four plus three is seven, that one's correct, we're adding something to four and our answer is three. This hopefully is where they start thinking.
Right, it can't be a small number.
It'S got to be 13. They can start writing their tens, their.
Carrying digits into the hundreds and they.
Can start putting numbers in here.
Trial and improvement really works for the.
Pupils who aren't quite at that understanding, but hopefully they can find the answer fairly readily. And there's some problems you can use to test our pupils to see their mastery with addition.
