Need a quick and simple way to check student understanding of simplifying fractions and finding the greatest common factor? This Fraction and GCF Exit Slip is perfect for the end of a lesson, small group check-in, math intervention, or quick formative assessment.Students will explain what it means to simplify a fraction, describe how they know a fraction is in simplest form, and find the greatest common factor of 6 and 12. The page includes three identical exit slips, making it easy to prin