I highly recommend using these when teaching how to multiply fractions. I used these with a 5th-grade class struggling to understand Multiplying Fractions. These tiles made it understandable where other methods had not. The students were engaged while using them and did well on the assessment, whereas the previous day, the assessment indicated that they weren't understanding the concept. Nice sturdy quality. They could have other uses as well. I am going to buy a set for my teaching team.