In practical activities usually teachers provide guidance in the form of students’ worksheet or design of laboratory activity. Based on field studies Supriatno (2009), only 24% design laboratory that can be done with the appropriate procedures and complete results in terms of data analysis and conclusion, so it does not support the construction of knowledge. It required the analysis to determine whether design laboratory used already support the construction of knowledge. Design laboratory analysis refers to the Vee diagram and revised Bloom's taxonomy as both lead students to construct knowledge. This research is a descriptive study with purposive sampling technique. The research data captured with a rare test work results table, the table where the component diagram Vee, Vee diagrams scoring table, as well as the revised Bloom's taxonomy table. The results of the 16 samples and 5 samples design laboratory, junior high school design laboratory of photosynthetic material shows that there are still procedural mistakes and instruction unstructured. Vee diagram component analysis results show the general components that arises is the question of focus, the object/event, theories, principles, concepts and knowledge claims. Components that are generally not appear that notes/transformation. Results of the analysis showed scores of each component Vee diagram, Vee diagram on middle and high school degign laboratory generally have not yet reached the ideal score. Results of the analysis showed the emergence of the cognitive level of cognitive level generally required design laboratory in middle and high school, namely C1, C2 and C3, with dominant category procedural C3. This cognitive level is in conformity with the demands of basic competencies middle school, but not in accordance with the demands of basic competencies of high school.

The purpose of this study is as an initial step to introduce Hermetia illucens as one of the best ways to decompose organic waste in secondary schools as well as to see how students think about strategies in carrying out a waste recycling project. To accumulate and to analyse the data sincerely and comprehensively, researchers used a method of ADDIE method which has extensive steps: analysing, designing, developing, implementing, and evaluating. The participants which involve in this study is 44 senior high school students in one of secondary school in Bandung. The participants will receive learning in the implementation phase and work on metacognitive questions as part of the evaluation conducted. The data was taken to carry out certain students’ strategies to solve the problem of waste decomposition. Based on data analysis, there is already the ability of students to carry out certain strategies in conducting waste decomposition in secondary schools. In addition, the effect size that gained by the student through this study is 1.33 which is categorised as very strong.

As human undoubtedly plays a role in today’s environmental problems, human inarguably must take control in overcoming them. Therefore, understanding how we can support the students in developing the ability to make environmentally friendly decisions is an essential part of an educational program. In this article, we evaluated the state and the role of metacognitive awareness as a factor that might affect junior high schools students in making a decision concerning environmental pollution, mainly the use of plastics in their everyday life.

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The aim of this research was to reveal a relationship between students' concepts mastery on the matter of environmental pollution with the ability to assess the credibility of the source through problem-based learning. The type of research is pre-experiment which analyzed by correlation method. Then the study design using the post-test only design with a total sample of 39 students of grade 10 and for sampling technique uses simple-random sampling technique. Student’s concepts mastery on material environmental pollution are identified using the instrument in the form of multiple choice questions and essay question, while the level of ability to assess the credibility of the source is identified based on the accuracy of the students sort the level of credibility of source and the students' answers on the criteria that they use to sort the credibility of the source, which is scored with a rubric that has been made. The average score of students' mastery of concepts is 74.1 and quite good. In addition, through one sample t-test was also proven when problem-based learning have a real or significant influence on students' mastery of concepts in the matter of environmental pollution. Correlation test is then performed using the non parametric statistical using Spearman correlation, and got score 0.82 for correlation coefficient, which means having a high correlation with a contribution of 67.5%. Thus the conclusions that can be drawn is that there is a high correlation between students' concepts mastery on the matter of environmental pollution with the ability to assess the credibility of the source through problem-based learning.