I am up to six colors with my Pre-K students and I made a sheet today to have them practice after my lesson. I took a much more complicated coloring worksheet of a pinata and traced it using more simple lines. Then I added my own numbers and key. Here is a finished example:
If you were teaching less colors you could white out the numbers 4-6 and replace them with 1-3 making it a 3 color worksheet. I really like the flexibility of this kind of worksheet. Here is a blank copy of this example:
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