In the 2013 curriculum, students are demanded to be active in learning process. To actualize it, teacher should has adequate ability and skills by implementing appropriate learning model in teaching. Purpose of the research was to know effect of Active Learning in form of scientific approach with assistance of student worksheets based Problem Based Learning to wards students' Biology competence in Bacterial material.  The research method used a quasi experimental research by using randomized control posted only design. The population was students in grade X MIPA of SMAN 1 Pasaman registered in academic  year 2018/2019. Samples were taken by using Purposive Sampling technique. Instrument used was psychomotor competence observation sheet. Data analysis was conducted by using Mann Whitney U test. The finding showed that there is a significant difference between students' biology competence in experimental class and control class, in which students' biology competence in experimental class is higher than in control class. Average score of students' biology competence in experimental class is 3.34 (B+) and in control class is 3.17 (B). So, it can be concluded that Active Learning in form of scientific approach with assistance of student worksheets based Problem Based Learning can improve students Biology competence.

Purpose this research to know effect scientific approach with assistance of student worksheets based PBL towards students’ Biology affective competence. This research is quasi-experiment using randomized control posted only design. Students class X is population. Purposive sampling is the technique, X IPA 4 (experiment) while X IPA 3 (control). The observation sheet was used as an instrument. Mann Whitney U test as data analysis. The results showed that there was a significant difference between the biological affective competence of experimental and control students, namely the biological affective competence of experimental class students was higher than the control class. The average experimental score 3.35 (B) and control 2.95 (C). The conclusion of this research is scientific approach with assistance of student worksheet based PBL on students enable them to increase their affective competence.

The effect of Active Learning in the form of Scientific approach with the use of students worksheet based on Problem Based Learning on Biological students knowledge. This kind of research is quasi-experimental by using research design; Randomized Control Posted only design. The population used here is students of X IPA Senior High School. The technique used is Purpose sampling and Class X IPA 4 act as experimental class whereas X IPA 3 as control class. Instrument that is conducted here is Objective and Essay. Data analysis by using T-Test. The result shows that there is significant differentiation between both class where experimental class knowledge is higher than another one. Average of experimental class students score is 86.74 and another class is 82.00. Based on the result of hypothesis test significant (0.008) < 0.05 so H1 was accepted. The conclusion of this research is Active Learning in the form of Scientific approach with the use of students worksheet based on Problem Based Learning on student enable them to improve their Biological knowledge.