A combination of 10 Heavenly Stems and 12 Earthly Branches, the year’s symbol creates a sequence of year names that eventually repeat. Students explore the least common multiple of these two cycles without ever hearing the term LCM.

# Category: Math and Social Studies

## Before the holidays activities (19 ideas)

## Hanukkah is almost here!

## Thanksgiving, shopping, football and giving

## Shopping season already!

## Veterans Day 2021

## Halloween spending 2021

Use our current data on Halloween spending in America to engage your students in an analysis of the ratios and percents of population, participation, and money spent in honor of October 31st. This activity takes kids through finding parts of wholes as well as ratio, percents and proportion problems.

## Federal debt and deficit – What are they?

## Indigenous Peoples or Columbus Day

## Chuck E. Cheese needed to shred

## Labor Day 2021

## Back to school activities

## Let’s learn to gerrymander

## How much will it cost this year to go back to school?

## Ranked Choice Voting in NYC

New York City is still tallying its election results for a new Mayor. This year they tried Ranked Choice Voting. What does that mean? How does that work? What are the ramifications of this sort of voting? Do you think that this will be a fairer and more positive way of electing a Mayor? Students experiment with the technique of tallying the votes using our flow chart and make some observations and decisions about the process.