# Maths KS1 & KS2: How long is quarter of an hour?

Sabrina needs to make a 15 minute long video of Tempo for a talent show. The children give examples of activities which take 15 minutes – like eating lunch or walking to school.

They use multiplication to find out how many of their one-minute activities they can do in 15 minutes.

Sabrina shows how 15 minutes is a quarter of the clock, so we call it quarter past.

graphic shows how a quarter is half of a half.

We see how the clock moves from 11 o’clock to quarter past 11 as Sabrina films Tempo doing impressions.

From BBC Series Round the Clock.

### Teacher Notes

KS1:

This could be used to explore the concept of a quarter. Find a quarter of different items by finding half of a half.

Children could be asked to find the quarters of different shapes by folding.

Count the number of a quarter of 60 beans by sharing the beans onto four plates.

Ask the students to find a quarter of a clock face by folding a cardboard clock face. Count how many little lines there are on the clock when the minute hand has moved quarter of the way round.

Children can investigate what they can do in 15 minutes: can they run round the playground or read a page of a book? What else can they do?

KS2:

Children could make a display of different ways to show a quarter: e.g. a quarter of shapes, quantities, ¼, quarter of an hour etc.

Investigate ways to find a quarter of different amounts. Help the children to recognise that finding a quarter relates to dividing into 4 equal amounts.

In pairs, children can investigate what they can do in 15 minutes. They can draw a clock showing where the minute hand is pointing on the class clock, and draw another one showiing where it will be pointing in 15 minutes.

Challenge the children to find out what different activities they can do in 15 minutes. Can they write the alphabet 15 times, write out a poem or do a jigsaw?

### Curriculum Notes

This clip will be relevant for teaching Maths at KS1 and KS2 in England, Wales and Northern Ireland and First and Second Level in Scotland.