Hi Ericka =] Have you tried downloading the EA/PCAQ tests of a higher level and taking out the parts that you can't yet do as well as simplifying other parts? Such as instead of a half pass, do a legyield or doing a medium/lengthened trot instead of an extended or go straight instead of shoulder-in? I hope you understand my 12am jibberish, haha. Or you could take parts out of those tests and just practise those parts, rather than doing the entire test.
You could also download tests from other countries and use them. I would recommend not practising those tests constantly though as you don't want the horse to learn them and anticipate movements in the wrong places. For workouts, you could always try a book called "101 Dressage Schooling Exercises" (I think...). It's got some really good exercises and is available at your local Horseland or Saddleworld. =] I hope I helped!