This paper focuses on the development of instruments to measure technology integration in learning environments. The model used as the basis for these instruments is the Technology Effectiveness Framework developed at the North Central Regional Educational Laboratory and described in "Designing Learning and Technology for Educational Reform" (B. Jones, J. Nowakowski, C. Rasmussen, and G. Valdez, 1994). Based on this model, the following instruments were developed: (1) a classroom observation instrument; (2) a teacher report of classroom observation; (3) teacher beliefs and practices instrument; (4) teacher technology use instrument; (5) student technology use instrument; and (6) a survey of technology infrastructures. Participants were teachers at 5 high schools at which 35 classroom observations were performed. After pilot testing of the instruments, the instruments were refined. The six instruments work together to produce a picture of how a teacher combines pedagogy and technology in a classroom with access to technology. The instruments are attached. (Author/SLD)