The effectiveness of instructional materials that were designed according to direct instruction and interactive unit in acquization, maintanence and generelization of addition and telling time skills in students with mental retardation

Ill SUMMARY The porpose of this study was to determine the effectiveness of 'Instructional Materials That Were Designed According To Direct Instruction' and Instructional Material That Wei# Designed According To Interactive Unit" in acquizition, maintanence and generalization of additiorland telling timeskills in students with mental retardation. 'Alternating Treatment Design' which was one of the single subject designs was used as a research design. A total of 4 students who were from school of Çağdaş Eğitim ve Uygulama during 1998 - 1999 education year and who can not independently add and tell the time and who have the pre-requisite behavior of these skills, constituted the subject group of this study. To collect the research data and to determine the performance levels of the students in basic addition and telling time skills 'Basic Addition Skills Criterion Referance Test' were developed. These tests were used, three times before and after the teaching of the skills. Besides, inorder to determine the students performance levels in basic addition and telling time skills 'Basic Additşon Assesment Device' and 'Telling Time Assesment Device' were developed and were used once at the beginning of the instruction sassion of interactive unit. Data of the study were given in graphs and graphs were qualitatively interpreted. T.C¥ÜKSEKÖ?3lETtM KURDLDIV Results of the study indicated that at the end of the instruction that was performed by ' Instructional Materials That Were Designed According To Direct Instruction' was more effective than the instruction that were performed by 'instructional Materials That Were Designed According To Interactive Umf. The instruction that were performed by 'Instructional Materials That Were Designed According To Direct Instruction On Addition And Telling Time' were effective on the maintanence and generalization of addition and telling time but, data on maintanence and generalization of addition and telling time skills can not be collected becouse, at the end of the instruction that were performed by 'Instructional Materials That Wee Designed According To Interactive Umf, the subjects can not acquize the objectives of the skills.