The Build-Your-Own Sets for the Young Explorer Series allow you to customize your homeschool course with all the resources your student needs to succeed, and items can also be purchased individually: 

• The textbooks are the foundation for each course and are written directly to the student in a conversational tone
• The notebooking journals include the Suggested Schedule and provide a place for students to document their work
• Audiobook versions of the textbooks are the perfect accompaniment for students who are auditory learners, slow readers, or have learning challenges that make reading difficult

Lab kits are available through outside companies and suppliers, but the hands-on activities mostly require common household items, and lab supply lists are included in each textbook.