Resumen:
The paper deals with a research focused on the blended learning model represented by an online component MyEnglishLab complementing English paper-based materials. At first, we viewed the blended learning model and we presented it in the context of sustainability in education. This is followed by the description of MyEnglisLab component representing the distant part of blended learning. Then, we presented a complete research carried out within undergraduate students at the Faculty of Science, University of Hradec Kralove attending English courses, where we applied the mentioned teaching design and verifying the effectiveness of MyEnglishLab tool. The study compared two groups of students; the group using MyEnglishLab reached better results.