Term 2
Year 4 Term 2 

Key Concepts – Number – Addition and Subtraction

Key Vocabulary – Addition and subtraction Total Equal to Sum Ones, tens, hundreds and thousands Difference between Take away Minus decrease Addition Plus Make Increase 
Key Concepts – Perimeter

Key Vocabulary – Perimeter Length Width Perimeter Measure Scale Estimate Centimetre Millimetre Metre 
Common Misconceptions – Addition and Subtraction That counting on can only help you work out the answer to addition calculations – when counting on is best to be used when subtracting numbers very close together. That children do not understand the value of the whole number and rather see it as a series of singular numbers. This will cause problems when it comes to crossing boundaries. That estimation should provide an approximate answer to a calculation and that it is correct to have an answer that is ‘nearly correct’. Common Misconception – Perimeter That children calculate perimeter by multiplying the length and width of a shape rather than adding the sides of the shape. That children will confuse perimeter and area That children will not check the unit of measure for each side and therefore have errors in calculating their answer. That children will put the start of the ruler at the beginning of a side to measure it rather than putting 0 at the start of the line. 