This teacher tool is a list of the factors for every number from 1 to 100. Students often generate an incomplete list when finding factors. This tool makes it easy for a teacher to tell students how many factors they are looking for. Instead of saying, "Find all the factors of 36," the teacher can say, "Find the nine factors of 36." This strategy is a good stepping stone toward independence in generating complete factor lists.
If you like this, please check out my Daily Number Study. It provides ten minutes a day of mixed math practice and includes three factoring activities.