One of my favorite new contemporary pieces that can be found on the Dutchcrafters website is this great buffet. The black would really pop against that lovely red color! The buffet can be found here: http://www.dutchcrafters.com/Amish-Contemporary-Carson-Buffet/p/45833

Consider Grey or white. U could also use geometric or any pattern in mint green

When dimensioning a classroom or teaching space, the best rule of thumb to produce both good sightlines and efficient layout is as follows: the space needs to be slightly rectangular, but NOT long and narrow. If X = 1, then Y should = 1.2 ideally, and no more than 1.5. Consider a comfortable space of 12 sqft. per student so if you have 6 students in a classroom then 72 sqft. + teaching space and walking space (60 sqft. or more) so say roughly you need 130 - 140 sqft. of space per class.

Siraj, sharing few pics would help the imagination.