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School librarians play a crucial role in making the 100th day of school celebrations memorable and educational in elementary schools. Beyond being a repository of knowledge, librarians can actively engage students in themed activities that highlight the significance of reaching this milestone. They can curate collections of books that explore the concept of counting to 100, featuring picture books, non-fiction texts about numbers and milestones, and even historical perspectives 100 years.
In addition to books, librarians can collaborate with teachers to create interactive displays and learning stations. These might include puzzles, games, and challenges centered around the number 100, encouraging students to count, measure, and think critically. Librarians can also introduce printables and worksheets that celebrate the 100th day, offering resources for teachers to incorporate into their lesson plans or for students to use during library visits. By fostering an environment of curiosity and exploration, librarians not only enhance the academic aspects of the celebration but also inspire a sense of achievement and excitement among students as they reflect on their educational journey so far.
Shirts

Etsy has a nice variety of 100th Day of School shirts for students and adults.

Amazon also has many 100th Day of School shirts to choose from.
Gifts and Novelties

I could not believe the number of gifts and novelties that are available on Amazon related to the 100th Day of School.
Printables

100th Day of School can be full of fun activities for students and adults alike. You can find hundreds of printables on Etsy that will support your celebration.