I loved using this product with my students while we were working on our Professional email unit- and they enjoyed it too. I projected the slides onto our whiteboard (a smartboard would be great, but our classroom does not have one). The first slide is an example of a well written professional email, to review with students what emails should look like.
The next five slides all have errors or missing pieces in them. I projected the image, and students came up to add in the missing parts (ie, they used a dry erase marker on the board to write in an appropriate subject, etc).
Each slide has various parts missing, with the final slide being the most difficult. These slides were based off of emails I have seen students send, so watching them correct them was great (not to mention I got a chuckle out of a few of them).