The Problem of the Year Challenge is designed to encourage students to problem-solve and think in creative ways.Students will use the digits of the year (each number can only be used once) to write an expression that equals the counting numbers 1-100. See the introduction at the top of the sheet (page 3) for more rules.This activity can be done as a class, as a competition amongst students or classes, or even a school-wide competition. It can be done as a bell ringer, independent work, group wor