Paper Title
The Development of U-Learning about Soil Improvement by the Royal Initiative of His Majesty the King for Ten Grade Students at Chachoengsao Province, Thailand

Abstract
The objective of this research is to develop the U-Learning about soil improvement by the Royal Initiative of His Majesty the King with effectiveness that reached the 75/75 standard, compare the learning achievement between before and after learning with the U-Learning about soil improvement by the Royal Initiative of His Majesty the King and study of attitude toward of student by learning with U-Learning about soil improvement. The samples used in this research were 30 Grade 10 students from Wat Ao Chang Lai School, Plaeng Yao District, Chachoengsao Province Thailand, during the sconce semester, academic year of 2016, selected by Multi - Stage Sampling technique. The Randomized Control Group Pretest-Posttest Design was used in this research. The research tools utilized in this study were. 1) U-Learning about Soil Improvement by the Royal Initiative of His Majesty the King. 2) The achievement test and 3) The questionnaire of attitudes toward learning with U-Learning. The obtained results showed that the efficiency of U-Learning about soil improvement by the Royal Initiative of His Majesty the King for ten grade students was 78.83/76.14 which was higher than the standard criterion at 75/75. The average score of the posttest was higher than that of the pretest with a statistical significance .05. The student attitude toward the using of U-Learning was at the high level. Index Terms - U-Learning, Soil Improvement.