When my kid asked for a digital watch so that she could tell the time I made a deal with her: if she would do five half hour lessons with me about telling the time, we’d go and buy a digital watch.

I had made some of these applets the previous year, and she had played with the minute hand applet from time to time. Since then, she mastered skip counting in 5’s, which now made the prospect of learning to tell the time a reasonable one!

First, I had to go and buy an analogue clock – our decorative clock was no use for learning. I bought a simple (booring..) one with minutes marked but not numbered for $15.

The clock opens the door to so many mathematically rich conversations. Like really, who is the authority on time anyway?

We used the applet below (by Duane Habecker) in each lesson, for one reason or another. We practiced pairing fives with the integers 1 to 12 in every lesson. And when we went to buy a watch, the analogue watches were WAY more fun than the digital watches – so that’s what she bought!

GeoGebra link: https://www.geogebra.org/m/KufMJ5JM

Next: Skip Counting Fives