-This research aims to develop on-line quizzes using exelsa moodle to improve student achievement in Economic of Environment and Natural Resources course. To collect data, students of Economic of Environmental and Natural Resources first degree in second semester 2015/2016 involved in the course quizzes. Data in this research is student result in on-line quizzes. The result showed that on-line quizzes using exelsa moodle could improve students' academic achievement in Economic of Environment and Natural Resources course.