### Teaching and Group Activities for Understanding

**Day 1 Teaching**

Show a kg weight. How else can we write 1kg? Remind children that ‘kilo’ means 1000. Hang a 0 card at 1 end of a washing line and 1000g with 1kg pegged beneath it at the other. Children peg different nos. of grams along the line. Repeat for litres and ml.**Group Activities**

-- Play a game converting from grams to kilograms and vice versa (1 decimal place).

-- Fill in missing amounts on a 0–1kg line. Order containers by eye, then convert from litres to millilitres and vice versa, to check.

**Day 2 Teaching**

Write a variety of distances on the board and use these to convert between metres and kilometres. Start to convert between miles and km and begin to draw line graph for conversion and read intermediate points.**Group Activities**Use the in-depth problem-solving investigation ‘Inches and Barleycorns’ from NRICH as today’s group activity.

Or, use these activities:

-- Construct a line graph to convert from miles to km and vice versa.

**Day 3 Teaching**

Brainstorm imperial units other than miles, e.g. pints, pounds, stones, ounces, feet, inches, yards. Do children know the contexts where they are used? Using different familiar contexts (packet of crisps, baby’s weight, milk, etc.) explore equivalent SI units.**Group Activities**

-- Use known facts to convert between centimetres and inches, kilograms and stones/pounds, litres and pints.

-- Measure height in cm, convert to inches, draw line graph to check. Work out how many grams are in a pound, use scales to check.