Verified answer

I'll go top to bottom:

2 braids (think Pippy Longstocking)

Chunky glasses (cheap at costume store) with tape on the bridge

Plaid shirt with breast pocket-Pens in the pocket, and a pocket protector

a totally unmatching tie or miss a button.

Tuck your shirt in

high waisted jeans or dress pants

legs on pants just a little short (waiting for a flood?)

long socks

flip flops

a backpack that looks really full (add a few extra books if not full enough)

GOOD LUCK :)