The effectiveness of the Student Assignment Center program (SAC), an inschool suspension program implemented in the Houston Independent School District, is evaluated in this report. The program provides instructional and counseling support services for middle-school students who risk suspension or expulsion for conduct code violations. Goals are to improve students' attitudes and behaviors through motivational techniques and to improve their organizational skills and study habits. Methodology involved surveys of SAC staff, principals, and teachers at 19 participating middle schools; student attitude surveys; and analysis of program recidivism rates. Findings indicate that, overall, the program was partially effective in achieving its goals--particularly, in improving the recidivism rate and classroom environments. However, deficiencies identified by respondents formed the basis for several recommendations, one of which is to combine long- and short-term frameworks. Nine tables and six figures are included. The appendix lists SAC resources. (18 references) (LMI)