This is a worksheet that I use with my guided reading groups. I do a small mini lesson beforehand. First I have them write several characteristics down about a specific animal on index cards (e.g. dog, cat, etc.). I then have index cards marked "All" and "Some". We start thinking about what characteristics "all" cats have and what characteristics "some" cats have. This allows me to explain what a generalization is. I then give them this worksheet with clue words to look for in generalizations. I give them time to create 3 generalizations on their own using a word from the box.
During the next guided reading lesson, I have them cut their generalizations apart and we start talking about "faulty" and "valid" generalizations. I start again with an index card marked "faulty" and one marked "valid". I explain the difference and then, as a group, we decide if their generalizations are faulty or valid. We place them under the correct index card as we go through them. You can also make a T chart and label each side "faulty" and "valid" and have the student re-write all of the answers in the appropriate side for reinforcement.