Each student is required to write one blog post.
It should not be a summary. Only two sentences of your post should summarize the reading or topic for that date, and that merely to provide context for what you are primarily going to discuss.
Primarily, the blog post should focus on one concept or idea in the reading or class meeting. You should try to explain the argument that concept is based on, or the reasons why the philosopher thinks about this concept the way that he does.
The blog post may focus on a passage that is particularly thorny, for example, and simply try to make sense of it. Or the blog post may address a single question and try to answer that.
It should go without saying that you should select topics that coincide with our classroom discussion, with what we have been thinking about.