Here are some deals you can score with the $1/1 Up & Up school supply coupon that is available. There is also a mobile version of this coupon that was delivered with the most recent set of Target mobile coupon.
You may also want to check for clearance, I spotted the following deal on a 2o pack of ball point pens.
Up & Up Ballpoint Pens (20 ct) $1.32
$1/1 Target printable coupon
Final Price = $.32 each