The Educational Resources Write-On/Wipe-Off Part-Part-Whole/Number Line Mats are a set of 10 indoor mats made of plastic, featuring colors and a theme of numbers. These mats are designed for children and have an educational objective of language, allowing kids to practice writing and solving math problems. The Write-On/Wipe-Off feature allows for easy cleaning and reuse, making them a convenient tool for interactive learning in a classroom or at home. The versatile design allows for both indoor and outdoor usage, providing a fun and engaging educational experience for young learners.