DDL activities: I had seen this a while ago, but then sort of forgot about it. The United Arab Emirates University hosts a Data-driven Learning activities website that utilizes an in-house corpus. It is meant for learners to use. Check it out, it might be useful.
Corpus Linguistics course: Dr. Monika Bednarek of the University of Sydney has developed and shared an online introductory Corpus Linguistics study package. It’s not really a course, but more of a self-paced study resource. I’ve been looking through it and it looks pretty good. A very thorough introduction to Corpus Linguistics. It is hosted on CourseSites, so you will need to register to view it. She posted her announcement and info about the package on her Academia page.
In the comments Mura Nava has posted a link to a brief review of Dr. Bednarek’s online Corpus Linguistics unit, which I’ve added here as well.