I need help finding a website

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I have an assignment where I have to sketch a classroom I am observing, then draw it on the computer. I drew the classroom on paper today, so now I need to put it on the computer. I have found a few websites including: http://classroom.4teachers.org/ and http://teacher.scholastic.com/tools/class_setup/. I need to be able to include the desks, dry erase board, doors,trash cans, etc. Can you please help me find a website where I can design a classroom. Thnk you in advance for your help! :)