While traditional teaching methods such as face-to-face lectures, training, and mentoring have been utilised in the educational process, the importance of websupported materials was better underscored with the advent of the pandemic. Documentary videos, prepared with scientific data, serve as significant web-supported materials. The aim of this research was to find out the effectiveness of web-supported videos on associate degree school students' academic achievement, critical thinking skills, and three-dimensional learning in science. The study employed a pre-post-test design, a type of quasi-experimental research, involving 42 associate degree school students enrolled in a child development programme. Data were collected using academic achievement tests, critical thinking skill tests, and three-dimensional learning scales, and analysed using non-parametric techniques. The two-month training revealed that web-supported videos contributed to the academic achievement and three-dimensional learning skills of students in understanding the concepts of the moon, sun, earth, and planets, though they did not have a significant effect on students' critical thinking skills.