I just discovered Mozilla Learning, so I'm not super familiar with how this community works.
I'm an editor/content writer that works full time for a K-12 EdTech company. I'm also super interested in upcoming technology and internet security, so I've worked on a few projects in these spaces.
Walking through these presentations, I find them awesome! They do a good job explaining a complex topic and making it engaging.
I did have some questions/comments on the activities. I'd be happy to discuss them in a more interactive way if that's helpful:
Including questions throughout the activity would help students process what they're learning. For instance, when students are playing with numbers in the console, including a set of questions that asks them why they think the answers are different, or if they observe any patterns. Then after making it more of a discussion, the teacher can walk them through the correct answers.
You might consider adding a place with vocab and definitions from all of the activities. That way, students can refer to these new words easily.
Again, I'm not super familiar with the context of these lessons, but I hope some of these points are helpful