In this study, 188 master‐level students received training through a distance education course to conduct functional behavioral assessments (FBAs) and behavior support plans with 68 boys and six girls (aged 3–20 years) displaying persistent behavior problems in inclusive preschools, elementary, and secondary schools. In the course, master‐level students’ scores on an FBA knowledge test increased from 13.2% to 68.8% correct. Changes in pupils’ target behaviors were evaluated with a total of 114 AB single‐subject designs and combined data with one‐group pretest–posttest designs. Comparing medians of means, disruptive behaviors decreased by 77.8% and aggressive behaviors by 88.7%, whereas task engagement increased by 91.5% after intervention. Nonparametric Wilcoxon signed‐ranks tests for related samples showed that changes were statistically significant for all groups with sufficient sample sizes. Adjusted effect sizes ranged from d = .5 to 1.6. Results indicate that positive changes in student behavior problems can be attained with function‐based interventions conducted by teams trained through a distance education course.