For the pleats, getting yourself a pleater-board is the trick. Basically it's a board with grooves/slots that lets you fold the fabric in with even pleats, then you just press front, press back, done.
Otherwise, schoolgirl skirts are quite easy to make; after the pleats, you essentially just sew the seam (or seams) up, gather the top in a bit to make the waist, put the waistband on and sew it in place, and then however you're fastening it up. You don't even need a pattern. I used an old Better Homes&Gardens sewing book for making mine ,though, so 'fraid I can't link to any tutorials myself.
Oh, but a tip from it; always pleat the fabric on the lengthwise grain; crossgrain (across the fabric) won't hold pleats, and wastes fabric. I also recommend sewing or at least pressing the hem before you pleat so it's straight.
Help me get rid of my parasprite swarm!
Originally Posted by Moofingham
There is a vibe here that says "We're in this together! Through thick and thin fabric! Through cold water washes and burning hot irons! Though we might super glue ourselves to our projects, cut holes/gashes/oh-god-mom's-gonna-kill-me into the dining room table, we will stand strong together. Unless there is a 75% off sale at the Fabric store. Then you're on your own. And get the hell out of my way." <3