2D shape - a flat shape, e.g. square, rectangle, triangle, circle

3D shape - a solid shape you can touch and feel, e.g. cube, cuboid, pyramid, sphere

100 square - a large square divided into 100 smaller squares filled with the numerals 1-100

Addition - combining two, or more, amounts to make a larger amount

Array - a group of dots, pictures or objects arranged in rows and columns

Capacity - the amount an object can hold

Cardinality - the quantity a numeral represents, sometimes referred to as 'howmanyness'

Composition of number - the idea that all numbers are made up of two, or more, smaller numbers

Corner - the point where two sides meet on a 2D or 3D shape

Digit - a single numeral, e.g. the 5 in 156

Double facts - an addition calculation where a number is added to itself, e.g. 1 + 1 = 2

Even number - a number that can be divided into two equal parts

Fewest - the group which contains fewer than any other

Five frame - a rectangle, split into five equal squares, used for counting

Irregular shape - a shape with unequal sides and angles

Length - how long or short an object is

Maths sentence - a calculation made up of numbers and signs. It can contain any of the four operations: addition, subtraction, multiplication and division

Most - the group which contains more than any other

Number - a value or amount; may be a word, picture or digit

Number bond - two numbers that add together to make a larger number

Numeral - a single digit, or group of digits, use to represent a number, e.g. 156

Odd number - a number that cannot be divided into two equal parts

Regular shape - a shape with equal sides and angles

Repeating pattern - a pattern made up of two or more alternating parts, e.g. red, blue, red, blue

Side - a line that joins two corners on a 2D or 3D shape

Spatial word - a word to describe the position of a person or object, e.g. above, below, in, on

Subitise - the ability to look at a small number of objects, or images, and recognise the amount without counting

Subtraction - taking one amount away from another to make a smaller amount

Tangram - a puzzle made up of seven shapes which are put together to make a square

Ten frame - a rectangle, spilt into two rows of five equal squares, used for counting