@shadow
The carpet looks better this time, still the map is too big.
I would advise you to keep only 1 space on the sides where you can walk, there's no need for more than 1 space in a class they are always well packed not wide and open.
Also that library is too tall, why does it take 2 floor spaces? I would adjust it so it takes 1 space. (I mean it takes 2 spaces vertically)
I would also make the room less tall as usually the teacher would have the board behind her desk not that far away. (Again have only 1 free space not more.)
I don't understand the point of the purple banner and the plant near the library so I was wondering why not move the library 1 space to the right and put the plant in the corner? You could also put another window at the other side of the board or leave it just wall.
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If you want to make a sort of tall room you could try and make the entrance an imaginary lower/higher floor with some stairs that go down/up into the classroom.
An example is a picture I have already uploaded so I don't have to make a map to give the example:

As you can see, without going 3d such a simple thing can make the room feel like it's going to a higher level.
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@vampire
This type of thread was closed once because there was people that didn't even try hard to give criticism, saying it looks good is not good criticism it's just an impolite way to go around the rules to post your screenshot. I sometimes give criticism even without posting screenshots because I like helping people and when I post a screenshot I expect to be treated the same.
The screenshot showoff while having no feedback/criticism rule people can still say if x screenshot is cool or something like that so I see no reason in not putting your screenshots there if you don't want to criticise other's work but want yours evaluated.
I really don't want this thread to close again because people are selfish, this thread helps a lot when your in doubt, not that good at mapping and many other reasons custom tilesets or not, doesn't make any difference.
I just hope the devs don't take your case so bad that influences this thread longevity as it helps people and can give ideas on how to map too.
This post has been edited by Vexus: Aug 22 2012, 01:24 PM