Category Archives: skype

Mystery Number Skype Makes Learning Stick

One of the best parts of my day is when I get to see kids apply what they learn to a real problem. It’s even better when I can see the wheels turning in their brains- which is just what happened this afternoon in Ashley Lawrence’s class.

Ashley’s class did a Mystery Number Skype with a class outside of the United States (we can’t say where because they have a geography Skype in the works!) In a Mystery Number Skype each class chooses a number and keeps it secret. Students in each class ask yes/no questions to try to narrow down the choices until they hone in on the correct number.


There’s a lot more to it than just guessing numbers. Students come up with problem solving strategies while forming questions. Because one strategy is to guess which number is in each place, place value is one skill that is strengthened. From here, students need to remember what it means to be odd or even. They show understanding of the concepts of less than and more than. In some cases step counting is a skill that is necessary to solve the puzzle.

This fourth grade class decided to up their game and use their understanding of factoring by asking if the other class’s number was divisible by 5 (it wasn’t)- so they could eliminate both 0 and 5 in the ones place.

Imagine how you could expand this with students who can use multiplication and division skills, decimals, and fractions. The possibilities are endless.

The whole experience, start to finish, was about 15 minutes. Compare this experience with 15 minutes of worksheet practice. Which one do you think sticks better?

To find classes to connect with via Skype, see the Mystery Skype site or join Connected Classrooms Workshop  on Google +.