Tag Archive for 4.NF

Population Clock

Click here to see the Population Clock bigger in a new window. How in the world does this clock conclude that there is a net gain in the United States of one person every 14 seconds?

Happy 14th B’ak’tun!

Clicking on this map of the Mayan territories will open it larger and in a new window Luckily, we’ve passed 12/21/2012 and the world is still here and we’ve made it into the start of the next Mayan calendar cycle…

Olympic schedule

I found this graphic online that should help me figure out when to try to watch an Olympic event on any day.  The chart seems a little confusing.  Can your students help me figure it out?