Year  2 Term 4

Key Concepts – Number –  Fractions

• That a whole is different to a hole
• That a unit fraction is where the numerator is 1 and the denominator is the number of parts that a whole is split into and that the fraction is one of those parts.
• That when the numerator is not one than the whole is still broken into equal parts as determined by the denominator but you take the number of parts equal to the numerator ie ¾
• That all fractions are numbers that can be placed on a number line.
• That it is possible to find different fractions of different shapes, measures and objects.
• That the same fraction can be displayed in different ways such ½ = 2/4

Key Vocabulary –

Fractions

Denominator/Numerator

Unit

Whole/part

Equal parts

Halves/quarters/thirds

Two quarters/three quarters

Equivalent

Sharing

Key Concepts – Measures – Mass/Weight and Volume/Capacity

• That measure is continuous
• The appropriate unit to measure items – It is important that children use estimation for finding the mass of everyday items – ensuring the use of appropriate measuring units.
• It is important that children use estimation for finding the capacity of everyday items – ensuring the use of appropriate measuring units.
• The reading of scales – identifying where different points lie on the scale – ie half/quarter
• Link Fraction work with ½ kg/l  1/4kg/l
• Understand the scales and that there may have different graduations.

Key Vocabulary –

Heavy/light

Heavier/lighter

Heaviest/lightest

Mass/Weight

Kilogram/grams

Capacity/Volume

Litre/millimetres

Vessel

Common Misconceptions – Fractions

That fractions are something different to a number

That to find fractions it is important that they are equal parts – related to the denominator

That equivalent fractions are not equal

That any fraction placed on the number line has to be placed in the right position – ie 1 ½ is exactly half way between 1 – 2 etc.

Common Misconception – Measures – Mass/Weight and Volume/capacity

They get confused with the different measures ie Kilograms, litres, metres

That there are 1000ml in a litre and 1000g in a kilometre and there are 100cm in a metre (1000 metres in a Kilometre)

That different shaped vessels may have the same capacity – ie a long thin tube will hold the same amount of liquid as a short but wider receptacle

That smaller items can be heavier than large items