Teachers, these 100th Day of School posters are such a fun way to celebrate this classroom milestone! The set of 24 gives you enough for a whole class, plus a few extras for absent students or mistakes. The friendly jellyfish design is absolutely adorable and ties into the 'Sea' theme perfectly. What's really clever is how they incorporate counting practice - students use the tentacles to visually group and count to 100, making math practice engaging and hands-on. The posters come ready to decorate, so students can use markers, crayons, stickers, or whatever art supplies you have to personalize their creations. This activity works for individual projects, small groups, or even as a collaborative classroom display. The quality is typical Really Good Stuff - durable paper that holds up to enthusiastic coloring and decorating. Beyond just being a fun art project, these posters actually reinforce important math concepts like grouping in sets of 10, which is a key skill for young learners. They make fantastic hallway displays or take-home projects that parents will love seeing. The activity is flexible enough for different grade levels too - younger students might need more guidance while older elementary kids can work more independently. Whether you're a classroom teacher, homeschool parent, or after-school program leader, these posters turn the 100th day celebration into an educational activity that students actually get excited about. They're one of those teaching supplies that makes learning fun while creating lasting memories of the school year.