Make learning about greatest common factors interactive with this GCF gallery walk! This activity includes 20 unique question pieces, student recording sheets, and an answer key, providing your students with ample opportunities to practice finding the GCF of 2 numbers and 2 monomials.The first ten questions focus on finding the GCF of 2 numbers, while the remaining ten questions challenge your students to find the GCF of 2 monomials. As the questions progress in difficulty, your students will de