This research proposal aims to study the effects of three different English reading instruction methods (Sustained Silent Reading, Shared Reading, and General Reading Instruction) on the English language acquisition of Thai students in grades 1-3, as measured by standardized tests. 420 students across three grades and three treatment groups will be pre-tested and tested at regular intervals over one year. The researcher hypothesizes that Sustained Silent Reading and Shared Reading will lead to greater improvements in English proficiency than General Reading Instruction, based on prior studies. Precise methodology and procedures are outlined to train teachers, administer treatments, and analyze results.