I think someone else may have mention lacing the sides of the portfolio but I
wasn't sure so I though I would share. I have the students punch holes every
inch along the sides. Then they lace each side up with yarn (just in, out,
in, out). They lace all the way up, turn the corner and lace back down. This
makes the portfolios stronger and you don't have to worry about the staples
sticking together. They are very durable this way and will last for more than
one year if you have a repeat student.
Teresa in El Paso