Measure length m, cm Length, distance In this unit pupils should only measure perimeter; e.g. with string. Measure mass kg, g Calculating perimeter is in 4. Mass Measure volume / capacity using l, ml Weight and mass are distinct though they are confused in everyday Volume language. Weight is the force due to gravity, and is calculated as mass multiplied by the acceleration due to gravity. Therefore weight varies due Capacity to location while mass is a constant measurement. centimetre, millimetre The prefix means one hundredth, and the prefix means one ‘milli-‘ thousandth. These words are of Latin origin. Kilogram, gram The prefix means one thousand. This is Greek in origin. ‘kilo-‘ Litre, millilitre NCETM: Perimeter 2-D Common approaches Every classroom has a sack of sand (25 kg), a bag of sugar (1 kg), a Notation cheque book (1 cheque is 1 gram), a bottle of water (1 litre, and also 1 kg Abbreviations of units in the metric system: m, cm, mm, kg, g, l, ml of water) and a teaspoon (5 ml) Teachers ensure that pupils correctly position the on the ruler when ‘0’ measuring the line. Reasoning opportunities and probing questions Suggested activities Possible misconceptions Show me something in the classroom that is between 20 cm and 40 NRICH: Some pupils may think that you put the end of the ruler (rather than cm. And another. And another. the at the start of a line to measure it. ‘0’) NRICH: measures two lines; 1 m and 35 cm. He says the difference is 650 Some pupils may think that the conversion factor between all mm. Do you agree with Kenny? Explain your answer. measures is multiply or divide by 10. Convince me how to find the perimeter of a shape. Some pupils may think that milli- refers to ‘million’ Create a shape with a perimeter greater than 30 cm. NCETM: Learning review KM: , NCETM:
Measure length m, cm Measure mass kg, g Measure volume / capacity using l, ml Length, distance Mass Volume Capacity centimetre, millimetre Kilogram, gram Litre, millilitre Perimeter 2-D Notation Abbreviations of units in the metric system: m, cm, mm, kg, g, l, ml In this unit pupils should only measure perimeter; e.g. with string. Calculating perimeter is in 4. Weight and mass are distinct though they are confused in everyday language. Weight is the force due to gravity, and is calculated as mass multiplied by the acceleration due to gravity. Therefore weight varies due to location while mass is a constant measurement. The prefix means one hundredth, and the prefix ‘milli-‘ means one thousandth. These words are of Latin origin. The prefix ‘kilo-‘ means one thousand. This is Greek in origin. NCETM: Common approaches Every classroom has a sack of sand (25 kg), a bag of sugar (1 kg), a cheque book (1 cheque is 1 gram), a bottle of water (1 litre, and also 1 kg of water) and a teaspoon (5 ml) Teachers ensure that pupils correctly position the ‘0’ on the ruler when measuring the line. Reasoning opportunities and probing questions Suggested activities Possible misconceptions Show me something in the classroom that is between 20 cm and 40 cm. And another. And another. measures two lines; 1 m and 35 cm. He says the difference is 650 mm. Do you agree with Kenny? Explain your answer. Convince me how to find the perimeter of a shape. Create a shape with a perimeter greater than 30 cm. NRICH: NRICH: NCETM: Learning review KM: , NCETM: Some pupils may think that you put the end of the ruler (rather than the ‘0’) at the start of a line to measure it. Some pupils may think that the conversion factor between all measures is multiply or divide by 10. Some pupils may think that milli- refers to ‘million’
Scheme-of-Learning-Maths-KS3.docx