ANDROID-BASED LEARNING MEDIA DEVELOPMENT FOR CHEMICAL BALANCE MATERIALS

This study aims to obtain an innovative android-based chemistry learning media for Chemical Equilibrium material in Class XII MIA. To achieve this goal, research on the type of development using the 4D method has been carried out. The media obtained were tested for feasibility, referring to the feasibility indicators of learning media in the National Education Standards Agency, BSNP involving expert validators. The research result show that(1) An android-based chemistry learning media (ChemsDroid) has been obtained on chemical equilibrium topic.(2). The ChemsDroid media obtained has met the eligibility criteria based on the National Education Standards Agency (BSNP), namely content feasibility, graphic feasibility, language feasibility and presentation feasibility.(3) The results of the perception test showed that students gave a very good response

EFEKTIVITAS MODEL PROBLEM BASED LEARNING BERMEDIAKAN LEMBAR KERJA PESERTA DIDIK TERHADAP HASIL BELAJAR KIMIADAN KEMAMPUAN BERPIKIR KRITIS PESERTA DIDIK SMA

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%.

IMPLEMENTASI PROBLEM BASED-LEARNING (PBL) DAN PENDEKATAN ILMIAH MENGGUNAKAN MEDIA KARTU UNTUK MENINGKATKAN HASIL BELAJAR PESERTA DIDIK TENTANG MENGAJAR IKATAN KIMIA

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

Analysis of the Utilization of Hydroponic Media in Welsh Onion Cultivation (Allium fistulosum L.)

The food crisis is a condition when acute food hazards and net malnutrition increase sharply. One reason is due to a slowdown in food production. In 1627, a new farming method was known, called hydroponics, namely the method of growing with the help of water. After further investigation, it was found that the cultivation method with water will eventually produce plants that are as good as plants grown using soil media. Therefore, this research will explore the benefits of using hydroponic media in leek cultivation. In this study, there were two containers, the first container was not subject to the application of pesticides, while the second container was watered with onion peel vegetable pesticides twice a week. The results of the leek planting experiment in the hydroponic system and media showed that the maximum height achieved by the leek plants tested was as high as 22.8 cm, and only 3 out of 17 total plants died

Analysis of the Utilization of Hydroponic Media in Welsh Onion Cultivation (Allium fistulosum L.)

The food crisis is a condition when acute food hazards and net malnutrition increase sharply. One reason is due to a slowdown in food production. In 1627, a new farming method was known, called hydroponics, namely the method of growing with the help of water. After further investigation, it was found that the cultivation method with water will eventually produce plants that are as good as plants grown using soil media. Therefore, this research will explore the benefits of using hydroponic media in leek cultivation. In this study, there were two containers, the first container was not subject to the application of pesticides, while the second container was watered with onion peel vegetable pesticides twice a week. The results of the leek planting experiment in the hydroponic system and media showed that the maximum height achieved by the leek plants tested was as high as 22.8 cm, and only 3 out of 17 total plants died

ANALISIS HASIL BELAJAR KIMIA SISWA YANG DIBELAJARKAN MENGGUNAKAN MODEL PROBLEM BASED LEARNING BERMEDIA POWERPOINT MELALUI PENDEKATAN SAINTIFIK PADA POKOK BAHASAN REDOKS

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, Redo