Marko the Pencil leads students on an entertaining adventure full of learning excitement. Topics include photosynthesis, parts of a plant, life cycles, genetic traits and adaptations, plant and animal cells, food webs, and more. A surprise rock star explains xylem and phloem cells. Clear explanations and examples hold interest and help boost test scores. Students also learn tips for getting high scores on a life science test. Approximately 59 minutes. Grades 38.