THE DEVELOPMENT OF SUPPLEMENTARY READING MATERIALS ON READING CLUSTER WORDS ENHANCE THE ABILITY IN READING WORDS WITH CONSONANT CLUSTERS FOR PRATHOMSUKSA 5 STUDENT

Abstract

The purposes of this research were to; 1. to the development of supplementary reading materials on fluent consonant clusters to enhance the ability in reading words with consonant clusters to be the efficient standard criterion of 80/80, and 3. to enhance the ability in reading words with  consonant clusters for Prathomsuksa 5 student before and after study by supplementary reading materials on fluent consonant clusters, The sample  was 15 students of Prathomsuksa 5 Ban Phon Thong School, , Loie province of Academic year 2022. The research instruments consist of 1. Supplementary  reading  materials of Prathomsuksa 5 with IOC between 0.67-1.00, and 2. learning management  plans of Prathomsuksa 5 with IOC between 0.67-1.00. and 3. test of student ability of reading materials on fluent consonant clusters of Prathomsuksa 5with IOC between 0.67-1.00. The item difficulty was between 0.30 to 0.80. The item discrimination was  between 0.30 to 0.90, and the reliability value was 0.73. The statistics employed include percentage, mean, standard deviation, E1/E2, E.I. and t-test (dependent sample)The research findings were as  follows: 1) The  supplementary  reading materials had the  efficient  standard criterion of  82.67/85.33.2) The effectiveness index of the supplementary reading materials of the skill of reading words with cluster was 0.731 or 73.17%. 3) The ability in reading words after learning was higher than before learning been statistically significant at the .01 level.