Upload a photo of yourself to your Blackboard profile. This will let your lecturers see who you are when they look at the list of students enrolled on the course and when you have made an online contribution, for example when you have made a blog post or discussion board message. (Note: Other students on your module/s will be able to see a small thumbnail image of you where this appears.)

See the Blackboard Profile help page, or this very short video showing how to edit your profile image.