Oh sorry, farhoud, that is pretty clear! There is some display stuff on here, but I guess you have checked? Mine is decorated with some powerpoints from here - British English versus American English  - there are pictures on that and that looks good. 
I �ve made a powerpoint
for mine, but it �s for older students. 
Then there is a great ppt on here with the wh words... 
If you google  �inspirational posters � you might have some luck. At the moment, I �m getting my students to make a display. It �s going to be three columns, with 
1) Yesterday/last week/last month 2) Now, 3) Usually, Normally, every day.. and then the past simple, present continuous and present simple form of the verb... with pictures to illustrate. I �m going to use the flashcards from MES English. They are good for display. 
I �m rambling on a bit... I don �t know of any such sites, but I also would be interested in any. Let �s hope somebody can suggest something!  
Lynne