Throughout the years of completing this thesis, I have been so thankful for many helps from many people.
Without these people, I would not have been able to finish my thesis. The people who read every word and gave me feedback based on their own years of experience to make this thesis complete were my three advisors, Asst. Prof Dr. Pachongkam Phuvipadawat, Assoc. Prof Wilaipom Tanasuwan, and Asst. Prof Dr. Prapassorn Krasaechai. I profoundly appreciate Asst.
Prof Dr. Pachongkarn Phuvipadawat for her advice for planning the lesson plans and the research instruments.