Math For Love

  • About
    • About Math for Love
    • Who We Help
      • Parents & Kids
      • Teachers
      • School Leaders
    • What People Say
    • Team
      • Dan Finkel
      • Katherine Cook
    • Podcasts & Articles
    • Contact
    • Fulfillment Policy
  • Award Winning Games
    • Prime Climb
      The beautiful colorful mathematical game
    • Tiny Polka Dot
      Number-Loving Learning Fun!
    • MULTIPLICATION BY HEART
      Deeper. More Connected. More Visuals.
    • 21st Century Pattern Blocks
      More shapes. More possibilities.
    • Upscale Pattern Blocks
      More sizes. More possibilities.
  • Free Lessons
    • Openers
    • Games
    • Rich Tasks
    • All Lessons (A - M)
      • 1-2 Nim
      • 1-2-3 Nim on a 10-Frame
      • 2, 4, 6 Puzzle
      • Billiard Ball Problem
      • Blockout
      • Broken Calculator Warm Up
      • Broken Calculators
      • Counterexamples
      • Counting Collections
      • Cuisenaire Rod Lessons
      • Cuisenaire Rods for K/1/2
      • Domino Sorting
      • Don’t Break the Bank!
      • Dots and Boxes
      • Double Digit and Dollar Digit
      • Fill the Stairs
      • Flower Petal Puzzles
      • Fraction Talks
      • Guess My Number
      • Horseshoes (+/-)
      • Magic Triangles
      • Math for Love Lessons on Volume
      • Math for Love Math Circle Lessons
      • Math Games and Movement Breaks
      • Math Magic Trick
      • Multiplication Table Sums
    • All Lessons (N - Z)
      • Number Talks
      • Pattern Block Triangles
      • Penny, Nickel, Dime
      • Pig
      • Prime Climb Color Chart
      • Pyramid Puzzles
      • Rectangles with Whole Area and Fractional Sides
      • Save Twenty
      • Square Building
      • Story Problem – A Trip to the Bakery
      • Story Problem – The Kite
      • Story Problem – The Ant and the Grasshopper
      • Story Problem – The Monster
      • Subtracting Reverses
      • Sum – Memory
      • Target Number
      • The Calendar Problem
      • The Hundred Chart Game
      • The Power of 37
      • Unit Chats
      • Volume Menu
      • What’s the biggest rectangle?
  • Curriculum
    • Kindergarten Curriculum
    • 1st Grade Curriculum
    • 2nd Grade Curriculum
    • 3rd Grade Curriculum
    • 3rd Grade - Fractions
    • 4th Grade Curriculum
    • 5th Grade Curriculum
    • 1st & 2nd Grade Curriculum
    • 3rd & 4th Grade Curriculum
    • 5th & 6th Grade Curriculum
    • 7th & 8th Grade Curriculum
    • High School Supplemental
  • PD
  • Resources
    • Blog
    • Best of the Blog
    • Puzzles
    • Math for Love Day Camps
    • Websites we like
SHOP

BLOG

November 8, 2011

Two great, idiosyncratic problem sources online

Two problems have been floating around in my head lately, and it’s only fair to share them, and let you know where I got them. Imagine this: You have four [...]

Posted In : , Link

Archives

  • January 2023 (2)
  • December 2022 (1)
  • October 2022 (1)
  • September 2022 (1)
  • May 2022 (2)
  • April 2022 (4)
  • March 2022 (3)
  • January 2022 (1)
  • November 2021 (1)
  • August 2021 (2)
  • February 2021 (2)
  • December 2020 (1)
  • November 2020 (1)
  • August 2020 (1)
  • June 2020 (1)
  • May 2020 (6)
  • April 2020 (6)
  • March 2020 (7)

Categories

  • 21st Century Pattern Blocks 1
  • Announcement 35
  • Audio 2
  • Classes 15
  • Doing & Thinking Math Classrooms 11
  • Early Family Math 5
  • Game 37
  • Guest 2
  • Kickstarter 2
  • Lesson 51
  • Link 94
  • Making and Breaking Conjectures 6
  • Math at Home 13
  • Math Musings 49
  • Math News 4
  • Math teacher Circles 1
  • One Minute Math 2
  • PDF 1
  • Pedagogy 13
  • Photo 21
  • Problem 25
  • Problem of the Moment 5
  • Quote 21
  • Regular 76
  • Review 14
  • Summer Staircase 5
  • Uncategorized 26
  • Video 34
  • Warm Up 2

Recent Posts

  • Another 21st Century Pattern Block Play Idea January 5, 2023
  • Math Play Every Day! January 4, 2023
  • Counting with very young children December 12, 2022
  • Upscale Pattern Block Provocation October 13, 2022
  • One problem causes a ton of issues when students learn numbers September 12, 2022
Math For Love
QUICK LINKS
  • About Math for Love
  • Award Winning Games
  • Free Lessons
  • Curriculum
  • Professional Learning
  • Resources
  • Shop
  • What People Say
  • The Math for Love Team
  • Contact
Search Math For Love
© Copyright 2020 Math for Love. All Rights Reserved. | Privacy Policy
Professional Services Web Design by Thomas Digital