This is an interesting resource, and it has been reviewed by Nik Peachey on his blog:
The lessons seem to be suitable for teaching in class or for teaching online. One problem with this kind of resource is that you are using a kind of text-book lesson, so some way to adapt it to make it more suitable for your own learners would be ideal. Constructing a course by using individual lessons also has the potential to become “bitty” and disjointed, so you would need to work out how the elements actually fit a curriculum.
However, in terms of getting ideas for ways to provide lessons, this could be extremely interesting.
Find the site here: https://www.off2class.com/