The purposes of this research were: first to study the level of academic achievement and active learning behavior, second analyze academic achievement on the basis of active learning behavior. The sample for this research included 32 persons who were studying in the academic year 2011 at the faculty of mathematic which study in STA 322 Nonparametric subject in KMUTT university of Thailand. The instrument for collecting data was a questionnaire on general personal background information-sex major subject, 10 domains of learning scale: attitude scale, motivation scale, time management scale, anxiety scale, concentration scale, information processing scale, selecting main ideas scale, study aids scale, self testing scale, and test strategies scale. The statistical methods and procedures for analyzing data were mean, standard deviation, t-test. The main findings were that score 1. Behaviors learning for active learning students which consist of Concentration scale and Study aids scale in Label of desirable of are highest. 2. Behaviors learning for active learning students which consist of attitude scale, time management scale, information processing scale, self testing scale, and test strategies scale in Label of desirable of are high. 3. Behavior learning for active learning students which consist of motivation scale and selecting main ideas scale in Label of desirable of are median. 4. Behavior learning for active learning students which consist of anxiety scale in Label of desirable of are small.
