Use the open number line and our lists of temperature extremes to make signed number operations and absolute value sensible. Students compare record high and low temps (integers) and use absolute value in order to always find the positive difference. Subtraction of negatives becomes obvious in this lesson.

# Tag: Data and Probability

## NBA Finals 2020

## Labor Day 2020

## What will supplies costs this year for going back to school?

## Memorial Day 2020

## Sadly, Jorge passed away yesterday.

## Mixing colors with food dye

## It’s time to gear up for Pi Day

8 activities to help celebrate π in your school and in your math class. Activities that demonstrate how π was derived; visually show why π makes sense; show a surprising place where π is used; increase students ability to measure and long divide; applauds the talent of people who can memorize large strings of numbers; and lets students just have fun.

## Iditarod – The Last Great Race

## Mardi Gras or Fat Tuesday

## Hanukkah dates keep changing!

3 Hanukkah activities; the amazing Hebrew calendar, soda menorah, and potato latkes. In the calendar activity, students look at the Hebrew calendar and appreciate the incredible mathematics involved in creating a calendar that aligns both the moon’s revolution about the Earth and the Earth’s revolution about the Sun.