The Scale of Primary Classroom Practices (SPCP) is a short instrument which enables primary school teachers to observe and assess what goes on in their classrooms. The SPCP is divided into sections that describe teachers' and students' activities. A study of the SPCP has provided support for the reliability and construct validity of the scale. Teachers can use the SPCP to: (1) determine how developmentally appropriate their classroom practices are; (2) identify which developmentally appropriate practices are not found in their classrooms; (3) foster cooperative learning experiences in their classrooms; and (4) select practices to implement in their classrooms. A copy of the SPCP is appended. (BC)