Calculating Time Intervals

Objectives

To calculate how many minutes there are between two given times.

To work out ‘how long’ by jumping forward in minutes to the next hour, then jumping on again to a specified time.

Resources

Abacus 4 Textbook 1 | Analogue clock | 7 Timestable (MyMaths) | Time Calculations (MyMaths)

Today's Lesson

Main Activity

New students should learn the 7 times table throughout the course of the week, as well as doing the other mental warm ups. For a range of activities, use 7 Timestable (MyMaths)

Call out a few random three-digit numbers and ask how many more to the next hundred. Do this for about ten

numbers.

Turn to page 36 in Abacus 4 Textbook 1.

Look at the page with your student. Using the analogue clock face, place the hands of the clock in the first position, then show the hands moving to the second position. Explain to your student that they need to be able to count how many minutes have passed in between the two times, giving 'real life' examples within your student's experience, e.g. How long a swimming lesson lasts / How long a regular bus journey takes / How long it takes to do today's maths lesson!

Watch the ‘Calculating time intervals’ video up to 4:32 to understand how to find durations of time using the frog method.

Show your student the ‘frog’ hopping from the first time to the ‘o’clock’ time and ask how many minutes have passed so far. Then, from the ‘o’clock’ position, hop to the new position and ask how many minutes have passed this time. Then add the two hops together, as in the example at the top of the page.

Run through activities on Time Calculations (MyMaths) for further practice if required.

Once your student has understood the concept, encourage them to work independently to complete page 36. If your student needs the clock face to help, allow them to use this.

Citations

[1] app.mymaths.co.uk [2] app.mymaths.co.uk