Abstract: The development of learning activities about forestry resource for 2nd level students aims to develop the learning activities about forestry resource for 2nd level students and compare knowledge attitude and behavior about forestry resource of 2nd level students that learning by integrate method and normally method. Samples were 150 students of Bancokrangnoi school and Nongyangtoi school in Tambon Nongyangtoi Srithep District Phetchabun Province obtained by the purposive random sampling technique. The instruments used for the study included learning activities, 40 items knowledge test, 30 items scale on attitude and 30 items scale on behavior about forestry resource. The collected data were analyzed by the used of a mean, a standard deviation, an effectiveness index and the paired t-test were employed for testing hypotheses. The research results revealed that the learning activities about forestry resource for 2nd level students was rated as a high efficiency and the students learning by integrate method showed gains knowledge attitude and behavior about forestry resource as a whole with learning by normally method (p<0.05).