At first I imagine most students will want to concentrate on treble clef, which is covered on pages 2 and 3. In my next unit I'll introduce a special method of clef-reading practice I call "Level Up!", and there is a worksheet that goes with it as well.
You might also want to get a computerized study aid for extra practice. Here are some programs and apps I like:
Mac / PCI really like Robert Whelan's free quizzers at emusictheory.com, which work on any computer with a java-enabled browser and acccess to the internet. He's got a nice Treble Clef unit. Try adjusting the settings at first to give you fewer pitches and then build from there.
iPhone / iPadIf you are willing to spend a few bucks ($4) I'd recommend Tenuto, which has a clef quizzer and a dozen other useful things. There is also Music Tutor which is a decent free app that only quizzes clefs.
AndroidThere are a lot of Android clef-reading apps that aren't that good. But I do like Sight Read Music. It can supposedly listen to you play your answers on a guitar or ukelele, but it also has a more typical input mode with buttons to push.
Note Trainer requires you to play your answers on a little piano keyboard, which may not be for everyone, but otherwise it's pretty neat. We'll get into piano skills soon enough anyway so perhaps you should give it a shot.