Students' critical thinking skills currently are in the low category. It causes the need for innovation in
learning methods and models that can improve students' thinking skills. This research aims to
determine the improvement of students' critical thinking skills through the problem-based learning
(PBL) learning model assisted by a virtual laboratory in the Biology learning process. This research
uses a pre-experimental method with a one-group pretest post-test design. The research subjects
consisted of 30 eleventh-grade high school students. Data collection methods include observation,
critical thinking skills essay tests, and student response questionnaires. Data collection instruments
use questionnaires and test questions. Test the empirical validity of the instrument using Pearson
product-moment correlation in SPSS and Cronbach's Alpha to test its reliability. Data analysis uses
the N-Gain Test for each indicator of critical thinking skills. The N-Gain test results show that applying
the PBL learning model assisted by a virtual laboratory significantly increases the average critical
thinking skills in the high category. Thus, there has been an increase in students' critical thinking skills
through the learning process using the PBL learning model assisted by a virtual laboratory.
Link artikel : berkas-20250814102409.pdf