Scholastic
Scholastic: Celebrate the 100th Day of School
This resource presents many 100th Day activity ideas. They are listed by the following subject areas: language arts, math, social studies, science and even a just for fun section.
ReadWriteThink
Read Write Think: Descriptive Writing and the 100th Day of School
Contains plans for three lessons that teach descriptive writing skills by creating and writing about a "100th day bottle." In addition to objectives and standards, this instructional plan contains links to PDF handouts and sites used in...