Celebrating Thirdsday

Here is a classroom activity to help you enjoy Thirdsday! Thirdsday celebrates the number 1/3 and occurs when January 3rd (or 1/3 when written as a US date) falls on a Thursday, as it does in 2019. The activity for your students is about an intriguing sum that gives us 1/3.
Age groups relevant for by Key Stage:
KS2,
KS3,
KS4,
KS5
Possible duration of tasks:
Up to 30 mins,
30 mins - 1 hour

Equipment needed

The worksheet, teachers notes, use of a spreadsheet or a calculator

Curriculum Topics Covered

Fractions, using spreadsheets, geometric series

More information

This activity accompanies Matt Parker's video (below) about Thirdsday. Now you can celebrate Thirdsday as a whole class!

Thirdsday was invented by mathematician Jim Propp (@JimPropp on Twitter). He tells us more about the special mathematical day in his blog post!

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