Effects of the Direct Instruction applied to Tier 2 RtI through the cooperation of homeroom teacher and special teacher on the rate and ratio achievement of Mathematics underachieving students in the 6th grade elementary school

Objectives The purpose of this study is to find out the effects of the direct instruction applied to Tier 2 of response to intervention through the cooperation of homeroom teacher and special teacher to mathematics underachieving students in the 6th grade elementary school. Methods For this two homeroom teachers and special teacher had 5 discussions to plan the intervention, monitor the response of students and identify if the students were achieving the intervention goal. Subjects were three 6th grade in K elementary school located in Seoul metropolitan city who are struggling at mathematics and the study used AB design. Intervention was provided 30 times for 10 weeks, three times a week. Results First, Rate and Ratio achievements of three students were increased. Second, they achieved their maintain phase goal so the effect of intervention was maintained after the end of intervention. All the students have achieved maintanence phase goal and two students were over achieved. Conclusions First, the cooperation of school members is needed and need to extend. Second, considerations are need to increase the effectiveness of regular lessons. Third, area of multi-tiered supports is needed to broaden from academic to behavior and social-emotion.