In order to assess educators' beliefs about individualization of instruction and/or mastery learning, the School Climate Assessment Learning Environments (SCALE-I) was developed. SCALE-I is an attitude-type instrument consisting of 30 positive Belief Statements. Subjects were three groups of educators from the Department of Defense Dependents Schools (DODDS) in the central Germany area. Forty-one elementary teachers, 55 secondary teachers, and 8 administrators participated in the study. The study focused solely on beliefs, not on school practices. Results of the study indicate that the DODDS educators in the sample believe in individualization of instruction and/or mastery teaching. Because of their positive attitudes, a favorable climate for individualization and mastery teaching exists. It is concluded that study results may be helpful to DODDS administrators and teachers in pursuing further their positive climate for individualization and/or mastery learning. A copy of the SCALE-I questionnaire is appended. (JD)