You will use Blackboard when you study at the University, and you will need it for DEC English language courses at CET. It gives you access to learning materials and allows you to communicate with English teachers and other students. There is plenty of assistance to help you to use Blackboard, starting with this page.
This video shows you how to locate and login to Blackboard (Bb) for the first time. You also learn how to upload a profile picture and find the FAQ section, where you can ask your course facilitators questions.