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Project Name:

Mystery Number Skype - math gamification

Project Description:

Students find the mystery number of the other class using math skills, tools, critical thinking, and yes/no questions.

Target Grade Levels:


How will students communicate with each other, and share their learning in this project?

Skype, Google Hangout, Facetime, other video conferencing platforms

Project Duration:


Handshake Activity:

Possible Handshake activity may include a mystery location skype prior to the number skype.

Guiding Question/Theme:

How can we locate a mystery number using math skills, tools, critical thinking, and yes/no questions?

Project Goals:

  • Students will use math skills to find the mystery number
  • Students will use communication and critical thinking skills to ask questions to help them find the mystery number
  • Classes communicate with other classrooms via Skype, Google Hangouts, Facetime, etc...
  • Students will learn to respect and appreciate the cultures and customs of others.
  • Students will be able to see the differences and similarities between themselves and others around the world.

How we will measure student contribution:

Student participation will vary depending on the job given and the level of ability.

How we will assess students:

We will assess their ability to work together, ask questions, and think critically.

How we will celebrate students' success and foster self-reflection:

Keep a tally of wins/losses

Additional Information: (How to join, contact information, etc…)

You will find your own classroom. Please fill out our google form and you will be added to a spreadsheet with all of the other participants sorted by time zone.

How it Works:

Students use their math skills to guess the mystery number that the other class has selected ahead of time.

Each class will be divided into 2 or 3 equal groups and compete against each other. This makes it easier to manage and ensures that everyone gets a chance to participate. The number of rounds depends on the number of teams. Each round will take about 10 minutes.

Play begins with one team asking yes or no questions and continues until one of the teams guesses the other’s mystery number.

Possible questions include:

1. Is the number odd?

2. Is it a 2 digit number?

3. Is it less than 50?

4. Is it between 40 and 50?

Teams go back and forth asking questions. The first team to guess the mystery number wins!

*Younger students will need some guidance by the teacher.

Team jobs:

Greeters – say hello and tell something about the class

• Inquirers – ask the questions

• Question Keepers – keep track of the questions and answers

• Trackers – use 100′s charts or other tools to help solve the mystery

• Digital Photographer/Videographer/Blogger - captures the call with a digital and/or video camera and writes about it on the class blog.

Helpful Information:

Mystery Number Skype

Please contact Louise Morgan