A fact is something that can be proved right or wrong. An opinion is something that someone thinks, feels, or believes. An opinion cannot be proved right or wrong. In this worksheet, children learn the difference between a fact and an opinion, then decide if each of eight sentences are facts or opinions. Students then practice writing a fact and an opinion on their own! Designed for first graders and other young learners, this reading comprehension worksheet offers valuable critical thinking and logic practice for beginning readers. Teachers can use this worksheet in tandem with our What's the Fact, Jack? Facts and Opinions lesson plan.