Resource
Common Core
<p>The Egyptians expressed all fractions as the sum of different unit fractions. Here is a chance to explore how they could have written...
nrich maths
Updated: 
2016
1 Comment
Resource
  • Math
  • K-2, 3-5, MS
Common Core
<p>Can you find a reliable strategy for choosing coordinates that will locate the robber in the minimum number of guesses?</p>Aligned to...
nrich maths
Updated: 
2016
1 Comment
Resource
  • Math
  • K-2, 3-5
What is the greatest number of squares you can make by overlapping three squares?
nrich maths
Updated: 
2016
1 Comment
Resource
  • Math
  • Elementary (Grades 3-5)
Use the clues about the shaded areas to help solve this sudoku.
Resource
  • Math
  • K-2, 3-5, MS, HS
Common Core
What can you see? What do you notice? What questions can you ask? Aligned to Common Core State Standard: 4.G.1
Resource
  • Math
  • 3-5, MS
Common Core
Charlie has moved between countries and the average income of both has increased. How can this be so? Aligned to Common Core State Standard: 7.SP.4
Resource
  • Math
  • K-2, 3-5
When intergalactic Wag Worms are born they look just like a cube. Each year they grow another cube in any direction. Find all the shapes that five-...
Resource
  • Math
  • 3-5, MS
Common Core
I'm thinking of a number. When my number is divided by 5 the remainder is 4. When my number is divided by 3 the remainder is 2. Can you find my...
Resource
  • Math
  • K-2, 3-5
These interactive dominoes can be dragged around the screen.
nrich maths
Updated: 
2016
1 Comment
Resource
  • Math
  • K-2, 3-5
Place the 16 different combinations of cup/saucer in this 4 by 4 arrangement so that no row or column contains more than one cup or saucer of the...