Thanks for trying the newspaper and book page blackout technique (scientific terminology there) in class Tuesday. Please share at least one of your blackout text pieces as a COMMENT on this post.
You could type the text you left on the page as a sentence or poem or story. You could also take a picture with your phone and post your work that way on your own blog, but that is optional.
I'm thinking you could do this same technique with any printed material containing a good chunk of text to work with. I also think you could be inspired to write all sorts of other pieces by using your blacked out piece as a starting point.
You could visit Austin Kleon's website to see what others have come up with and even post your own work there if you're up for it.