The objectives of this research were 1. to instruct Package of Spelling Cluster Thai Words written exercises according to the criteria 80/80 2. to compare learning outcome and to study satisfaction of Mathayom Suksa 1 in Wat Praphang School, Muang, Uttaradit students through using the Package of Spelling Cluster Thai Words written exercises.
The target group consisted of 8 students from Mathayom Suksa 1 students in
Wat Praphang School, Muang, Uttaradit. The research instruments used were: the Package of Spelling Cluster Thai Words written exercises that consisted of achievement test, and Student Satisfaction Questionnaire. The data were analyzed by E1/E2, t-test dependent, mean (X ̅), and standard deviation of items (S.D.). The research findings were as follows:
1. The Package of Spelling Cluster Thai Words written exercises for Mathayom Suksa 1 students in Wat Praphang School, Muang, Uttaradit were effective 80.9/81.25 higher than the defined criteria 80/80
2. Achievement of Mathayom Suksa 1 students after using The Package of Spelling Cluster Thai Words written exercises was higher than before were statistically significant at the .01 level.
3. Satisfaction of Mathayom Suksa 1 students through using The Package of Spelling Cluster Thai Words written exercises were at a highest level of Satisfaction.
Key Words : Activity , Spelling