This instructional interactive Google Slides Presentation explains what the Greatest Common Factor (GCF) is and gives two methods on how to find it. In the first method students find all the factors which divide into two or more numbers. In the second method, students make prime factor trees to find the Greatest Common Factor. This can also be purchased as part of bundle which also includes a Google Doc Worksheet and Quiz with answer keys. Access this Google Product by clicking on the link provided.