Scientific themes: Each worksheet set has a different scientific theme with several unsolved terms. Themes include animals, biomes, body systems, continents, and planets. Once students have solved the mystery terms, educators are encouraged to plan a class trip to the school or local library. Students should research at least one term from the options provided.Math facts include: addition, subtraction, multiplication, and division facts. Grade 2 through Grade 4 learners benefit most from these