I owe my co-operating art teacher for this one!
I made these big portfolios with my younger grades which took a large chunk of time and labor- and then she mentioned she was thinking about using handled grocery bags.
I'm sending home my fifth graders work this week so I decided it was worth a try.
I stopped in Trader Joe's last week and they hooked me up with a large stack.
This worked out fantastic for sending home a pile of work!
(Fits 12 x 18 papers perfectly.)