This activity encourages students to think about the way fractions work. Help students to understand that a fraction, such as 1/3 (one third) actually means "one out of every three". If they understand this, they can break any whole set of objects into fractional parts and identify how many items in a given set are of a specific type!
Model/Teach this using real-life materials, first, and allow students opportunities to practice. Students should concentrate on the denominators to determine how many to count by. So, for instance, if the denominator is 3, they will color or label one in every three according to the prompt.
This is a great activity for individual students to demonstrate mastery, or for pairs to work collaboratively.