Come join or root for your favourites!

This is a unique type of event! Math games are hosted online and all participants play in real-time! You can join from all over the world by using a smart device and internet. Playing in math game day is an engaging experience, offering enthusiasm and excitement. Even spectators feel the thrive when watching online!

Quick and engaging

The fastest player wins! Every team plays 3 games for a total of 20 minutes.

Real-time action

Every round is versus a different team in real-time. You can see the results instantly.

Live Viewership

Classmates, parents and teachers can root for their favourite players online!

Feedback from the last event

Krista Bernhardt

Krista Bernhardt

Tartu Mart Reiniku Kool

"The students were so competitive; I could hear them yelling out their answers!"

Klaarika Prii

Klaarika Prii

Pärnu Vanalinna Põhikool

“A quick and fun way to compete with other students in math.”

Heily Epro-Volmer

Heily Epro-Volmer

Harkujärve Põhikool

“I like that other students could also check the results. I didn't even need to leave the school to participate.”

Luule Vanaselja

Luule Vanaselja

Tallinna Ühisgümnaasium

“It's great to compete with other schools and see the results instantly.”

Watch a short introduction video

Game Day Flow

Date and time

  • The Math Game Day is for 1st-8th grade students in the U.S.
  • The Winter Game will take place on December, 11, 2019.
  • Due to the time difference, there will be 2 online tournaments in the U.S. on the same day.
  • The first tournament starts at 10 am Eastern Time.
  • The second tournament starts at 10 am Pacific Time.

1st-2nd grade starts at 10:00 AM
3rd-4th grade starts at 10:30 AM
5th-8th grade starts at 11:00 AM
The MGD ends at 11:20 AM

  • Check the detailed timetable for your grade level here.
  • Teacher registers teams before December, 9, 2019. You cannot register teams after the deadline.

Teams and registration

  • A team is a group of minimum 5 players.
  • Teacher registers teams before the registration deadline. Students don’t need to register.
  • Teacher can register multiple teams.
  • A team can consist of more than 5 players, but the total score of the team will be a sum of 5 best players.

Competition details

  • Participation is free for all of the U.S. teachers!
  • Math Game Day is an online competition. You don’t need to leave the school.
  • Players will need individual smart devices/computers and good connection to the internet.
  • Each team plays 3 games and competes with other teams of the same grade level.
  • Classmates, teachers and parents root for their favorite players online!
  • Check the detailed timetable here.
  • All of the players will receive digital certificates! You can print them out and present to your teams on the next day after the competition.


  • Practice for the event at 99math.
  • See the results of the previous tournament here.


  • Tell the world about yourself, your teams and your school on social media!
  • Join us on Facebook and share your team’s preparation video.
  • Use #99MathGameDay on Twitter to talk about your team.

Math Game Day is organized by 99math (a startup). We are on a mission of creating positive learning experiences through engaging math practice. Play is the engine of learning!

Practice for the big day

99math is a fun classroom game to practice and revise math skills!
It is so engaging for students that teachers use it every week as a quick warm up exercise. The platform is online and you can use it for free. Try it in your next class: