We definitely are dining room table people for school. However, my high schooler does go to a desk in her room when she needs quiet space to concentrate (math, science, writing.). When one child needs to go off to do some more quiet, independent work, we use something like his with a chair or a couch:
http://www.wayfair.com/Sauder-Carson-Forge-Lift-Top-Coffee-Table-414444-L441-K~SAU1556.html?refid=GX64336614420-SAU1556&device=t&ptid=100036555500&gclid=CPyNrJPsnMQCFZI1aQodDJYARw
And this: http://www.ikea.com/us/en/catalog/products/80091713/
I am not trying to sell anything but give ideas!!
Blessings!