There are hundreds of ways to celebrate the 100th day of school, which occurred last week for Warren County students, with many of them participating in fun activities. The day is mostly observed by the younger students, who are learning basic math skills, focusing on counting to 100.“The 100th day of school is about reinforcing counting skills and teaches math along with the concept of time,” said Eastside kindergarten teacher Melody Brock. “It’s also a popular thought among kindergarteners that after the 100 days they are ready for graduation and first grade.”