Khodanu, T. and Wangphanich, C. 2026. A STUDY OF VOCAL PERFORMANCE ACHIEVEMENT THROUGH A CHOIR INSTRUCTION PACKAGE BASED ON THE CONCEPTS OF ZOLTAN KODALY AND CARL ORFF AMONG GRADE 8 STUDENTS AT CHUMCHON WATBANGKHAN SCHOOL. Fine Arts Journal: Srinakharinwirot University. 30, 1 (Jun. 2026), 167–182.