Keystage 1 Maths videos
Welcome to our KS1 instructional videos. We wanted to create an area of our website to show you how we teach some of mathematical concepts in Year 1 and 2 at Red Oak. We have enlisted some help from our maths experts!
In KS1, we use concrete objects (sometimes referred to as manipulatives), pictorial representations and abstract concepts to solve different maths questions/problems.
In Year 1, your child will be learning to:
Addition:
Add two 1-digit numbers to 10
Add 1 and 2-digit numbers to 20
Subtraction:
Subtract two 1-digit numbers to 10
Subtract 1 and 2 digit numbers to 20
Multiplication:
Counting by 2s, 5s and 10s.
Solve one step problems with multiplication
Division
Solve one step problems with division (sharing or grouping)
In Year 2, your child will be learning to:
Addition
Add three 1-digit numbers
Add 1 and 2-digit numbers to 100
Add two 2-digit numbers
Subtraction:
Subtract 1 and 2 digit numbers to 100
Subtract two 2-digit numbers
Multiplication/Division
Recall and use multiplication and division facts for the 2, 5- and 10-times table.
Solve one step problems with multiplication
We have included some videos to support your understanding of how we may explain these difficult concepts. You are welcome to use these to support your explanations to your child and to help with their homework.
Isabelle (Year 1) uses a tens frame and counters to solve her problem. You may recognise she places each one carefully into the sections on the grid. In addition to this, Isabelle touches each counter and she calculates the total number carefully.
Marnie (Year 2) uses base 10 to solve her problem. These are an effective way to support your child’s understanding of how to solve a column addition. It is important at Year 2 that your child writes out their calculation alongside using or drawing the base 10 to help them to solve.
Jack (Year 2) models how to use the formal column method to solve his problem. Notice that he always starts by adding the ones column first, this is important to support your child’s understanding when the numbers cross over 10 or when an exchange is needed.
Reggie (Year 1) uses numicon to help solve his problem. This supports children to see how the parts come together to make a whole. He uses his subitising skills to find the numicon shapes he needs quickly to solve and check his answer.
Sophie (Year 1) uses a part-part-whole model to support her understanding. When the parts are complete and the whole is empty, children use aggregation to add the parts together to find the total. They can also be useful to support children to find the missing part of a calculation. This is when the whole is complete and at least one of the parts is missing.
Jasper (Year 2) explains how you can use pictorial representations to solve a maths problem. This uses the same method that Marnie modelled in video 3. The images he draws are a representation of the base 10 manipulatives.
Marnie (Year 2) is demonstrating how we use manipulatives to solve a subtraction maths story. By the end of KS1, your child needs to be able to subtract numbers up to 100. Marnie has used straws in this video.
Marnie (Year 2) models how to use the formal column method to solve the problem. Notice that she always starts by subtracting from the ones column first, this is important to support your child’s understanding when an exchange is needed.
Jasper is able to show us how to solve a multiplication maths story using pictorial representation. Jasper draws an array. He carefully draws the groups of arranged into rows and columns carefully. This helps him to understand the fact family and describe the groups he has drawn.
Marnie (Year 2) explains how you can use pictorial representations to solve a maths problem. This is using the same method that Marnie modelled in video 7. The images he draws are a representation of the straws that she used.
Jasper demonstrates how to solve a multiplication maths problem. He uses the counters to show lots of or groups.
Jack demonstrates how to solve a division maths story. He uses the counters to show the sharing method. It is important that your child counts the total number carefully before sharing between the exact number of groups they have. You may find it easier to draw a shape or representation for your child to share the objects between.
Jack uses the ones (from our Base 10) to demonstrate the grouping method. Your child will learn both the sharing and grouping method to solve division maths stories. This is to support your child’s fluency with mathematics and to support them solving maths questions at speed.
Jack demonstrates the pictorial representation of the grouping method. It is important that your child can share objects equally before trying to represent the objects as drawings.
If you require any further assistance with how to explain any of the mathematical concepts to your child, please ask your class teacher for further support.