This experimental study was conducted to investigate the effectiveness of Animated Video Lectures on the academic achievement of Secondary School students in the subject of Biology. Research design for this experimental study comprised of The Pretest- Posttest Equivalent Group Design. The main objectives of the study were: (i) To explore the relative effectiveness of animated videos on academic achievement of secondary school students. (ii) To find out the difference between treatment effect on low and high achievement students. Animated Video lectures downloaded through internet were presented on computer to facilitate the instruction. Video based materials boost student creativity and cooperation. Access to video can help motivate students and create a distinctive context for their learning experience. Forty (40) students of 9th Class of Government Centennial Model School (Boys) Mardan were randomly selected as sample of the study. Only the students of Biology were included in the sample. Both the groups were taught by routine methods of teaching. Pre-test, posttest and retention tests were administered as research instrument for the collection of the data. Mean, standard deviation and t-test were applied as statistical tools for finding out the significance of the results. It was concluded that the Animated Video Lectures facilitated the experimental group students by presenting the complex ideas in simple and understandable way. So the experimental group students performed better than the control group students due to treatment effects.
Key words: Animated Video Lectures, School students, Biology