Using the 12 and 24 hour clock

This is a PowerPoint presentation about the 12 and 24 hour clocks. It starts by showing examples of when the 24 clock might typically be used. Examples include radio alarm clock and airport departure boards. The presentation then shows various common events during the day such as the start of school or lunch time. The time is clearly displayed on a large analogue clock face. Both digital and analogue times are shown.