This activity is great introduction to equivalent and simplified fractions. Students need to understand that simplified fractions are equivalent to the original fractions, just divided into less parts. I use this activity with fraction tiles. If you don't have fraction tiles you can find printable fraction tiles online.
I teach students that the simplified version of the fraction is the fraction that uses the least amount of tiles.
When students are finished with the activity, there are some questions for the students to answer about equivalent and simplified fractions.
This activity aligns with 4.NF.A.1 and 5.NF.A.1