One of the new resources I have been exploring over the past few weeks as the result of my involvement in Math Rocks, a community of teachers in my school district working together to build relationships and spread the love of math, is Estimation 180. This website includes a plethora of images from the real world where students have to estimate some figure in regards to what is represented in the picture. For an example, see the picture below.
The website is organized by days. As of today, the site is up to 220 days; therefore you could use this website everyday for 220 days and get a different picture each day. Wow!
Here’s how it works:
1. Choose an image.
2. For each image, have students answer the following questions:
- What estimate is too low?
- What estimate is too high?
- What is your estimate?
- What is your reasoning? Begin with, “I noticed . . .”