Tuesday, September 22, 2020 at 13:30 UTC (which is the same as 9:30 am EST), will be the Autumnal Equinox. It is the time of year when the imaginary plane that passes through the Earth’s Equator would also travel through the…

# Category: Math and Science

## Extreme weather 2020

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.

## How big is this hornet really?

## It might be a good year to see the Perseid meteor shower

## How much water should you be drinking?

## String design, ellipses, and orbital mechanics

Artistic way to encourage understanding of a conic section. Participants physically build an ellipse by choosing two foci and sketching the figure through a loop of string. While stitching an elliptical string design they puzzle about varying the foci spread and the loop length to create more extreme ellipses and are intuitively introduced to the measurement of eccentricity.