Research suggests a positive relationship between schools' efforts to engage parents and parents' involvement in their child's education. The authors investigated school socioeconomic status, school size, grade level, and student-teacher ratio as predictors of schools' efforts to engage parents of students receiving special education services. The dependent variable was the Schools' Efforts to Partner with Parents' Scale, which has been validated for states' use in their federal accountability systems. Mean school-level scores were calculated for 265 schools in a large southeastern state. Results indicated that student-teacher ratio was the strongest predictor of parents' perceived school engagement efforts. Implications are drawn for ways in which all schools, including those with high student--teacher ratios, can improve their collaboration with parents of students receiving special education services.