Students towards understanding the basic principles of economics. The rise of e-commerce is undoubtedly a big challenge for the world of education, especially in providing understanding for students as the millennial generation in utilizing the e-commerce media. E-commerce has now become a millennial market that offers easy access to the distribution of economic activities. This research is an experiment using E-Commerce media by teachers for students learning to understand economic principles. Learning by utilizing e-commerce media is carried out in class VIII of SMPN 3 Banyuresmi. The results showed that before using e-commerce, students' understanding of economic principles was relatively low, with an average mark of only 65. In contrast, after the teacher used e-commerce media, there was an increase in understanding to an average of 78, meaning a significant increase of around 13 points. Therefore, using e-commerce media and ebusiness is beneficial for students in understanding the current millennial economic activities.