This aims of this study are to: (1) find out whether android-based interactive learning media that developed have met the feasibility standards based on the android-based integrated BSNP, (2) find out whether student learning outcomes taught using android-based interactive learning media that have been developed higher than the Minimum Completeness Criteria (KKM) score on the reaction rate material. This research is a Research and Development with the ADDIE (Analysis, Design, Development, Implementation and Evaluation) model which was carried out in the odd semester of the 2021/2022 academic year at SMAN 12 Medan. At the implementation stage, a one-group pre-test post-test design was used, with sampling using a cluster random sampling technique consisting of one XI science class at SMAN 12 Medan. The results of the validation of the android-based media obtained for the feasibility of the contents is 3.75; display feasibility is 3.83; language feasibility is 4, and graphic feasibility is 3.83. Overall, android-based learning media obtained a feasibility level of 3.85, with a very feasible category. Furthermore, android-based learning media on the reaction rate material is implemented in the learning process. The KKM scores and the students' average post-test scores were 78 and 85.6, respectively. The data obtained were analyzed using the right-hand t-test. The result of data analysis is that tcount is in the significant area, tcount > ttable = 4.146 > 1.711. So that Ha is accepted and H0 is rejected, it can be concluded that the learning outcomes of students who are taught using Android-based interactive learning media are higher than the KKM value.
This study aims to find out the chemistry learning outcomes of students with the completeness of the value of Minimum Completion Criteria (KKM), knowing the students 'social attitudes in the learning process, knowing the differences in learning outcomes, the correlation between students' social attitudes toward learning outcomes, and which models are most effectively used in learning models in giving a high contribution to student learning outcomes and students' social attitudes. The study was conducted on class X students of SMA 1 Tigapanah Karo Regency. The results showed that the percentage of students' completeness scores from experiment 1 was 75%, experiment 2 and experiment 3 were 45.83%. The percentage value of experimental 1 social attitudes which belong to the high category is 54.2% and which is categorized as quite 45.8%. The value of students' social attitudes from experiment 2 which belong to the high category is 58.8% and those that are classified as sufficient categories are 41.2%. The value of the students' social attitudes from experiment 3 which belong to the high category is 66.7%, which is categorized as quite by 29.2%, and which is classified as a category of less than 4.1%. The difference in posttest values that experimental learning results 1 (73.13)> experimental class 2 (67.29)> experimental class 3 (66.88) and social attitudes of students in each class can be seen from the average score of students' social attitudes, namely (70.44)> experiment 2 (69.12)> experiment 3 (69.79). There is a correlation between social attitudes and learning outcomes in each class. Teaching with the Problem Based Learning model with powerpoint media through the most effective Scientific Approach is used in teaching to students as evidenced by the highest average learning outcomes of 73.13 and the average value of student learning outcomes is 70.44.Keywords: Problem Based Learning, Powerpoint, Scientific Approach, Redox
This study aims to determine whether there is an influence on the implementation of PBL through a scientific approach that provides a media card for high school students' chemistry learning outcomes. To achieve this goal, quasi-experimental research was conducted using two classes, namely the experimental class and the control class. Data obtained using a validated test instrument in the form of pretest and posttest. The results showed that (1). There was an increase in chemistry learning outcomes from the average pretest 27.2 to 63.95 and 72.5 in the two classes of experiment I and experiment II, respectively. (2). Student learning outcomes that are taught with the Problem Based Learning model and the scientific approach provides higher paired cards than using textbook as a media.
The aim of this research is to know the effectivenessproblem based learning model (PBL) using student worksheet on learning outcomes and students’critical thinking skills on the teaching Reaction Rate. The population in this research was grade 11th of SMA Negeri 6 Medan. Classes sample was taken by random sampling, and two classes were selected as a sample. Those two classes will be taught with Problem Based Learning model, the difference is the first class will be used students worksheets and the other class is not. The instrumentto conduct this researchwas by test and non-test. Based on parametric statistical test, the result of pretest, postest, and students’ critical thinking skills data from those two classes have a normal distribution and homogeny. Hypothesis was tested by using one tailed test with significant level ( ) =0,05. The data from hypothesis testing learning outcomes is tcal ttable (3,101 1,669), means Hois rejected and Ha is accepted. Hypothesis testing result on students’ learning outcomes using student worksheets is higher than the non-using student worksheet. Critical thinking hypothesis test is tcal ttable (4,754 1,669), means Hois rejected and Ha is accepted. Hypothesis testing result oncritical thinking using student worksheet is higher than the non-using student worksheet. Contribution of students’ critical thinking to the ups and downs of learning outcomes on the experiment class is 81,5%.
Research on inulin which was isolated from yam tubers (Pachyrhizuserorus).This research is a experimental laboratory research. The Qualitative Analysis of Inulin is Reduction Sugar make a Bennedictand The Quantitative Analysis Inulin was isolated from yam tubers is characterized by using Forrier Transform Infra Red (FTIR).
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