Holliston Extended Day School is an education management company based out of 370 Hollis St, Holliston, Massachusetts, United States. Holliston Extended Day is an afterschool program serving the public schools of Holliston, Massachusetts. Our children range in age from pre-school through eighth grade. These age groups are divided into three programs. The first is YKO, which is our pre-school/kindergarten classroom. The second program is called OKO and is home to children in grades 1-4. Finally, we have YMD, which is the program in serves students in grades 5-8. All programs share the same basic philosophy, yet each has its own, unique, age-appropriate goals.