[b]Author[/b]: Yanjinlkham Lkhamlkha & Navchaa Tserendorj & Tumenbayar Davaanyam (Mongolia)
[b]Abstract[/b]: We prepared resources in Geogebra based on Principles of multimedia learning on certain topics and studied effect size of high school student achievement when we teach using our resources. During this study we used one control and one experimental group both in city and rural region.
