Pengembangan Instrumen Penilaian Berbasis Scaffolding Untuk Mengukur Scientific Reasoning Pada Pembelajaran IPA di SMP

Abstract

Scientific Reasoning is the ability to think systematically and logically to solve problems. The aim of this research is to determine the provision of scaffolding based as-sessment instruments to measure scientific reasoning in science learning in junior high schools on temperature, heat and expansion which was carried out in November at one of the MTsN 1 Jember Schools, Jember Regency. This research uses Borg and Gall. Samples were taken using small group tests and large group tests in class VII E, F, G, H. This re-search instrument is in the form of scientific reasoning test questions developed by Law-son, namely the LCTSR (Lawson Classroom Test of Scientific Reasoning) type. The re-search results show that the validity of the assessment instrument has an average of 80.59%. The reliability of the assessment instrument obtained an index of 0.837 and can be categorized as very high reliability. Discriminating power of question items There are 3 categories, namely, 5 items in the good category, 10 items in the sufficient category, and 5 items in the bad category which is determined by the discriminating power of the 20 ques-tion items tested. The difficulty level of the 20 question items tested resulted in a percent-age of 20% easy, 70% medium and 10% difficult. However, these results still need to be improved so that students can be trained to have Scientific Reasoning skills