Using math concepts convert a recipe to serve 25-30 people. Pumpkin Bread Includes a worksheet.
Students learn all about photosynthesis from the book.
Try to make leaf fossils. You can make them with plain mud or better yet plaster of paris. Look into Barbara McClintock and simple genetics. This site has a collection of poems about apples written by second grade students from different schools. Each school has a separate page to showcase their work and different poetry formats are described.