hiding & showing posts, using blogs again & again & again

All you need to do if you're using a blog for the second time and want to hide a number of posts which have already been created and reveal them again sequentially in keeping with the progress of the course is the following:

--click on "edit posts," then "edit" the posts you'd like to hide.
--click on the "save as draft" or "save now" button, and the post will be saved as a draft and invisible to readers of the blog.

--to re-open it, click on the "edit posts" button again, and then "publish post" and the post should appear.

to change the time or date or whatever, click on "post options" and put in whatever you'd like.