I have three sets of these two are completely sealed and one is just opened at top shown in picture . First two bought will get the completely sealed ones The McGraw Hill Wonders Reading/Writing Companion GRADE K Set Units 1-10 is a comprehensive workbook designed for kindergarten level students studying writing and reading. Published by McGraw-Hill, this companion is personalized to help students engage with the Wonders Reading Writing Companion program in an engaging and effective manner. It includes units 1-10 in English language, making it a valuable resource for homeschooling students looking to improve their writing and reading skills.