Mr. Elementary Math has a lot of great ideas. This is one that I thought I would share. This document he shared has two templates: one geared for primary grades and one geared for intermediate grades.
He calls this activity The Amazing Race. The premise is simple. Pair students. Choose a number for them to put in the "Number of the Day" box. They then work with their partner to come up with as many ways to decompose that number as possible. He recommends starting with decompositions to help build place value knowledge, but I think as your students' abilities progress, you could begin to ask for other ways.
Teachers can move from very easy numbers to decimals, fractions, or exponents depending on their students and needs.
There are many ways it could be used in a classroom: in a math rotation, as an opening or closing activity, as a challenge activity, as an early-finisher activity...No matter when you use it, I recommend that you get students to collaborate and talk math. It is a great opportunity to use and build their math vocabulary.
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