MathWonders ClockWise Playing Cards

ClockWise® Playing Cards

Subtract fractions with "WAR" : 3rd through 8th graders can immediately compare fractions playing this simple card game: Use the Clockulator poster, lay the cards in their relative position on the clock, and tell which fraction is larger, helping them visualize the true spatial difference between fractions. After a few minutes of getting to know the fractions on the clock, they're ready to declare how much they win by: for example, 7/12 is laid out at the 7:00 position, and 1/3 at the 4:00 position. The winner of that round would say, "7:00 beats 4:00 by 3 hours, which is 1/4", while they are looking at a 90 degree angle of space between 7/12 and 1/3. Next add in the decimals suit, then the percents, and then the degrees suit for the highest level of mastery.

Match equivalents with "Go Fish" : If you have the 1/4 card, ask your neighbor: "Got any 3 O'clocks?"... If they have 0.25, 25% or 90 degrees, that's a match!


  • A fun set of educational math cards for kids of all ages.
  • Develop number sense for fractions, decimals, percents, and degrees.
  • Mental math card game to improve your math skills.
  • Master equivalent fractions, decimals, percents and degrees.
  • Excellent math enrichment activity for small groups and math clubs.
  • Perfect for fun math team practice.
  • Use the cards to map out a visual model or chart.
  • Fun for all ages, especially intellectual math geeks, math junkies, as well as kids just learning about fractions and decimals.
  • As kids use them, they become fluent in interchanging between decimals, and percents, fractions and degrees.
  • Great for homeschoolers to play all sorts of card games, from War to Solitaire to Texas Hold'em.
  • For gifted as well as challenged math students.
  • ELL and ESL students also enjoy these cards.
ClockWise® Playing Cards combine fantastic mental math skills with any conventional card game you already enjoy! This 52-card deck has 4 suits: fractions, decimals, percents and degrees. The 13 ranks of each suit are the 12 points of the clock, plus the 1:30 position, which is 1/8, 0.125, 12.5% and 45°. Because it matches a conventional card deck, you can play any game, from "Go Fish" to "War" to "Texas Hold 'em," as well as any solitaire favorite, like "Klondike" or "Free Cell." Or you can always make up your own games !! The deck comes in a sturdy, beautiful carton, with 3 extra cards explaining the deck and reference table of equivalent values, and a beautiful diagram placing all the ranks radiating around the clock. This deck complements the ClockWise System Book, especially as a math-center or math station activity. Ideal for home schoolers! Easily adaptable for kids of all ages, and fun for adults who enjoy an extra challenge in their card games.

Math Wonders ClockWise Playing Card Back

Each deck includes:

  • 52 playing cards (13 ranks in 4 suits)
  • 2 reference cards
  • 1 card with basic instructions
  • 3 pages of instructions, with ideas on how to adapt this deck to most conventional card games.


Buy for your whole district!

Math Wonders ClockWise Playing Card Back   Download ClockWise Card Game Instructions

  Instrucciones para las Cartas de Juego ClockWise