Activity Database

Activity Authors
Activity Circles
Click To Sort By
  • 9th - 12th (1)
  • For Teachers (1)
  • Geometry (1)
Supporting Materials
Supporting Materials
  • Facilitator Guides (1)
  • Handouts (1)
  • Lesson Plan (1)
Session Styles
Session Styles
  • Problem Sets (1)
Mathematical Practices
Mathematical Practices
  • MP1 - Make sense of problems and persevere in solving them. (1)
  • MP2 - Reason abstractly and quantitatively. (1)
  • MP4 - Model with mathematics. (1)
  • MP5 - Use appropriate tools strategically. (1)
  • MP6 - Attend to precision. (1)
  • MP8 - Look for and express regularity in repeated reasoning. (1)

Queen’s Move


Students will explore a game between two players moving a chess Queen from place to place on a square grid. The Queen may move any number of spaces to the left, any number of spaces downward, and any number of spaces on the downward-left pointing diagonal. Each player takes turns using these moves. Whoever gets the Queen to the bottom-left square first wins!

Bubbling Cauldrons


Place our numbers into the cauldrons in ascending order – you can choose which cauldron each one goes in. However, if two numbers in one cauldron add up to a third number in that same cauldron, they bubble up and cause an explosion! This means that all the numbers, leave the cauldrons, and you must start all over again.

Our goal is to find the largest number we can place in our cauldrons without them exploding… do you think you’re up for this daunting task?

Humans, Zombies, & Other Problems Crossing the River


A town faces an epidemic of zombies! Luckily, the virus has just started to spread and the infected are able to stave off their hunger for human brains… for now. In fact, they’re willing to work alongside the remaining humans to help them get across a river to safety. Can you get all the humans and zombies across safely?