Lindvall's observation system has been designed to assess elementary school students' behaviors in an Individually Prescribed Instruction (IPI) project. It measures the self-directiveness of the student by determining how pupils use their classroom time when they are not actively being guided by a teacher. The system focuses on student behaviors, and student interactions with peers and instructional materials, as opposed to student-teacher interaction. The coder surveys the entire classroom every two minutes for each listed activity; thus, after two minutes, each pupil will have been coded as performing one of these activities. Ten two-minute coding periods are obtained for each lesson. Five activity categories are included: (1) independent work--14 categories; (2) teacher-pupil work--three categories; (3) non-instructional use of pupil time--eight categories; (4) pupil-pupil activity--two categories; and (5) group activity--nine categories. This document also contains a description of IPI program components and instruction for coding and summarizing results. (GDC)