2023-11-20 09:44:30
Green, green river
Green, green river

During the St. Patrick's Day parade in Chicago, the local plumbers union dyes the Chicago River emerald green.
Students learn what PPM (parts per million) means and attempt to figure out how much dye is used to sufficiently color the river.
Comments (0)
Display 1 - 10 Of total 0
It's almost summer now
How much wat...
What's with the plovers?
Cute little birds. Piping plovers are ...
Downside Up
🔍 In this updated activity, students...
How long will it take you to trick-or-treat?
It's Halloween and this is your neighborhood...
Star Wars ... the story continues
The Rise of Skywalker will open on December...
Crazy basketball score
Wow! Look at that score!
There were some sc...
Shrinking Toblerone
New York Times photo - Credit Darren Sta...
California water measurements - chains, links, and furlongs
[caption id="attachment_17570" align="aligncenter"...
How many hot chocolate scoops do I need?
Even though it is now Spring, here in New Englan...