The objectives in this research are : (1) To know whether is any difference the average of biology instructional by using model of cooperative learning STAD and NHT type. (2) To know which one more high the average of biology instructional by using model of cooperative learning STAD and NHT type. This research was conducted at the seventh grade of junior high school SMP N 1 Batanghari academic year 2011/2012. The sample of the reearch is VIIc and VII E from five classes using cluster random

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... ling technique. From the hypothesis testing by using the formula of t tes, can be concluded that 1). There was any significant different the average of biology instructional by using model of cooperative learning STAD and NHT type. 2). The average of biology instructional between students' learning using model of cooperative learning STAD more high from the average of biology instructional by using model of cooperative learning NHT. Kata kunci: STAD, NHT, Hasil Belajar Biologi Based on the result of the research, the reseacher seggest to increase the instructional of students' biology study about human organization material more effective using model of cooperative learning STAD type.