These G.C.F. (greatest common factor) and simplify organizers (two total with answer keys) should be utilized after mastery of G.C.F. has occurred. On these organizers, students will be asked to find the G.C.F. of two numbers and then use the G.C.F. to assist in simplifying proper fractions. For extra work on G.C.F., please look in my store for the G.C.F. and L.C.M. organizers. The preview will give you a glimpse of the first organizer. Enjoy.