Hardly. In the elementary classrooms, there's TONS of stuff on the wall. Kids' work, the calendar, how many days of school have we had, posters, things hanging from the ceiling, etc. When you get to the upper grades, you generally have far LESS things on the wall. I have two bulletin boards, one for kids' work and one for general information (lunch menu, sports schedules). That's it, and I'm pretty typical for my school.
While, yes, there are colorful decorations, you do have to be careful as to not have over-the-top decorations because that can distracting for the student.
Have you been in a Preschool or Kindergarten classroom lately?

I can assure you 100% this is so wrong. Looks like your DD is 4 so you'll either be homeschooling and wont see it or you'll see it next year... think toy story 3 that is how preschool and k classrooms are decorated... (with out the talking toys that is... that would just be freaky)
I
am a preschool teacher. I am on maternity leave, so it has been since May since I actually taught in my classroom. I did decorate it this year prior to school starting, and I am in the school quite often considering I take DD.
Yes, my room is decorated. It is colorful. However, too much decor can be distracting for young students.
While I don't teach elementary age, I did take quite a few elementary ed classes in addtion to my early childhood education classes (original goal was elementary teacher, but I really like the 3 yr old age

). In both classes - elementary and eary childhood, we were cautioned against using too many decorations due to the distraction factor. I've also spent quite a few observation hours sitting in elementary classrooms. The teachers that I observed had nicely decorated rooms, but none were over the top.

Um, no. The younger grades have more in them. The K and 1 classes even have centers with things like play kitchens and
Lego tables.
So does my classroom...blocks, homeliving, puzzles/manipulatives, books, art, etc.
Too much can be distracting.
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Just did a Google search for "decorations distract students"
At least three of the first five searches speak directly to too many decorations being a distraction.
Teacher Message Board Thread
"...Anything too "busy"-looking will distract students..."
"Too much of overloaded information can distract students" - In context, they're referencing visual information given through classroom decorations.