The Church of Christ Sunday School includes classes for Preschool through 4th grade with an enrollment of 6-12 in each grade, and a combined class for 5th–7th graders. For the 2007–2008 school year the Sunday School is developing a new and exciting curriculum based on a model of rotating activities and lessons for all the children. Most weeks, the children are in the Sunday worship service for the first 10-15 minutes, and are dismissed to their classes after a Children's Message. The Sunday School programs are complemented by Confirmation classes for 8th–10th graders, and by two new Youth Groups, one for 4th–6th graders, and the other for 7th–10th graders. The Youth Groups meet on Sunday afternoons and evenings twice a month.

The Sunday School focuses on teaching the children about God's love shown forth in traditional Bible stories, and in the life and actions of all the adults involved.  An important focus of the Sunday School is ongoing mission activities, which include

• bringing donations for the Millis Ecumenical Food Pantry on the first Sunday of every month;

• sponsoring a child named Courtney Paige through Save the Children;

• special projects at Christmas and Easter;

• participating in the church's offerings for One Great Hour of Sharing and Neighbors in Need.

The children truly are learning the Good News and joy of helping others in the name of Jesus Christ.