I like being able to have everything I need in one place. This box has a handy storage compartment on top where I keep index cards (great for notes to the kids as well as making flash cards), a pen & pencil, paper clips, and one of my most important tolls...Sticky Tabs! (handy for bookmarks and place-holders of all kinds).
Inside there are hanging files for organizing my worksheets and Teacher's manuals. Up front I have my All About Spelling Letter Tiles Mini Office.
The hanging folders are color-coordinated for each subject (the kids have folders and spirals of the same color for that subject). Green is Science. Here are some handouts for my daughter's Supercharged Science.
My son is doing Lego Robotics this year, and his worksheets and quizzes are in the other green hanging folder.
Red is for Language Arts. Here are some homophones worksheets for my daughter that I printed off from the All About Homophones e-book...
...and my honkin-huge Easy Grammar manual.
I'm always surprised that the hanging folders haven't given out on me yet, between the huge EG manual and the hardbound math guides from Math-U-See, but they've held up pretty well.
Finally foreign language. My son really wanted to learn Japanese this year. He's using Irasshai (put out by Georgia Public Broadcasting, looks like a great course!) and My Japanese Coach on the DS for a fun way to review. Between this and robotics, I think I'm in trouble...translated 私は困っている !
When it's time to check my kids' work, I just sit down with my binder and my box and I'm all set!