The Fast Paced Game of Mental Math Magic
Award-winning and delightfully addicting, Proof! is the equation hunting card game that's good for your brain too! A long-time favorite of teachers, it's loved by kids, families, and grownups alike.
Selected by teachers for "exceptional quality and outstanding performance in the classroom and at home!"Learn More
Adaptable rules for younger players and solo play, too. Practice multiplication, division, addition, subtraction, and square roots.Watch Review
New math puzzles inspired by Proof! posted every Monday. A popular activity to challenge math lovers in the classroom or at home.Play Now
Quick! Find an equation among the nine number cards on the table.
Once you've got one, shout the result before anyone else!
Tell everyone the proof. If your math adds up, keep the cards you used.
Deal more and keep going. When the deck runs out, the player with the most cards wins!
After placing 9 cards face up on the table, try to find equations using at least 3 of the 9 cards and any combination of +, -, x, ÷, and √ (square roots).
For example, below are some equations you could make with the cards shown at left. above. Remember to shout the answer first then show your work.
Selected by teachers who evaluate various educational games and tools, winners are products of "exceptional quality and outstanding performance in the classroom and at home!"
Selected by an academic board, winners provide "robust educational value" with "innovative and unique" products. Testers raved, "From the interesting, bright packaging to the detailed rules of play, this game was not only educational, but FUN."Read More
The selection process "screens for originality of design and purpose, long-term learning value, long-term play value, fair market value, and fun" and "winners attest to the power of learning through play."
Evaluators raved, "Proof! is an excellent card game," "Kids will love playing Proof! and it will sharpen their math skills," and "This is such a fun game to play with the whole family. It will really get your mind working and the pace is fast."Read More
Proof! participated in the 2018 Mensa Mind Games competition, and many of its brainy members gave it top marks saying, "LOVE this game", "Fast moving and different", and "A real thinking person's game!"
I would definitely recommend this game to a teacher. [Proof! is] an awesome, fun game for students to engage in while learning math!
Teacher's Choice Award Evaluator
LOVE this game! [...] Fast moving and different. [...] A real thinking person's game. [...] Accessible for so many ages and abilities.
From the interesting, bright packaging to the detailed rules of play, this game was not only educational, but FUN.
Academic's Choice Award Reviewer
My 8 yo loves this game. Sometimes she will even sit there herself and just lay the cards out and see what she can come up with.
My 4th grade students love this game! It is easy to learn yet challenging!
What a perfect game for my fourth graders to practice their mental math. It’s engaging. Fast paced. Can be easily differentiated for all students.