I found this site. Please, pay a visit.
Tenses in Colour
"A few years ago I spent a lot of time working on how to present the English tenses to my language students. I came up with a set of colour-coded charts which were pretty popular with my students. I once tried to get them published, without success, and since them they have been languishing.
So now I have published them here as an open source project."
http://pogol.net/index.php?p=22#more-22
Download the ppt and tell us what you think.
Thank me later
!!!