This study was to investigate the speech and language abilities of a second-grade student with cluttering after the student underwent a 10-session comprehensive speechrate reduction intervention in the junior high school. The comprehensive speechrate reduction intervention combined speech-rate reduction, phonological awareness, articulation correction, narrative and reading practices. Each session was 35 minutes long. The results were that the student decreased his speech rate (from 210 to 200 syllables/ minute), improved his phoneme discrimination ability (more than 80% correct rate), increased the percentages of difficult phonemes (from 80% and 60% to 85% and 75%), and improved the ratio of reading comprehension (from 66.33 to 100%), vocabulary intelligibility (from 86% to 90%), narrative ability and self-awareness.