This study aims to study the issue, writing letters to 1) Thailand students for secondary 1 to secondary 3 school in Chiang Rai province, 2 bun rueang) to create a practice writing letters, Thailand for high school students to.Secondary school science and bun rueang 3) to compare the ability to write letters of Thailand training before students writing letters, Thailand and after training, writing letters, Thailand. The population used in this study include: high school students 1-3 school in Chiang Rai province bun rueang year 2558 number 38 people the tools that are used in collecting personal information is to write a letter assessment form Thailand. Test the ability to write letters and Thailand training to write letters, Thailand. Analyze data by finding the percentage average study results summarized as follows:
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