Overview8 copies of Web Wizards (Pioneer). Discover the incredible world of spiders. Explore the special features and behaviors of spiders and learn about their life cycle. The Explore On Your Own Pioneer and Pathfinder books enable all students to deepen science content knowledge with identical content at two reading levels: Pioneer (grades 2-4) and Pathfinder (grades 4-6). They also provide the opportunity for students to independently apply multiple reading comprehension strategies.