The purposes of this study were (1) to improve the integrated lesson plans according to the Philosophy of sufficiency Economy : Garland Subject for Mathayom 4 students of Debsirin Nonthaburi School (2) to compare the achievement before and after using the integrated lesson plans according to the Philosophy of Sufficiency Economy : Garland Subject for Mathayom 4 students of Debsirin Nonthaburi School and (3) to study the pleasure of the students towards using the integrated lesson plans according to the Philosophy of Sufficiency Economy : Garland Subject for Mathayom 4 students of Debsirin Nonthaburi School It was one Group experiment research with pre-test and post-test. The samples consisted of 40 mathayom 4 students at Debsirin Nonthaburi School studying Garland subjectsemester 2/2560 The samples were selected by Purposive Sampling The instruments were 3 integrated lesson plans according to the Philosophy of Sufficiency Economy : Garland Subject 30 item’s for achievement-test : Garland Subject for Mathayom 4 students and the questionnaires measuring the student pleasure towards using the integrated lesson plans according to the Philosophy of Sufficiency Economy : Garland Subject for Mathayom 4 students of Debsirin Nonthaburi School The statistical procedure employed were percentage mean standard deviation and the t-test. The finding showed that the integrated lesson plans according to the Philosophy of Sufficiency Economy : Garland Subject for Mathayom 4 students of Debsirin Nonthaburi School in the aspects of moderation reason good immunity knowledge condition and moral were significantly different at the .05 level the practical skill was increased and the students’pleasure on the questionnaires of using the integrated lesson plans according to the Philosophy of Sufficiency Economy : Garland Subject for Mathayom 4 students of Debsirin Nonthaburi School were at the high level ( X =4.38 S.D.=.26)