Activity
University of Cambridge

University of Cambridge: Nrich: Constant Counting

For Students 3rd - 8th Standards
You can use your calculator to count by all kinds of numbers: 2s, 3s, etc. This one page website shows you how to do that and gives you a challenge besides. The solution for the challenge is waiting for you right at the website once you...
Activity
University of Cambridge

University of Cambridge: Nrich: Reverse Trick

For Students 3rd - 8th Standards
Get your calculator and your problem solving skills out to solve this challenge. You can find the solution right at this one page website.
Professional Doc
National Council of Teachers of Mathematics

The Math Forum: Teacher 2 Teacher: Use of Calculator Discussion Room

For Students 9th - 10th
This site is a discussion room where teachers have commented on the use of calculators in the classroom. If you're a teacher feel free to join in on the discussion or ask your own question regarding calculators.