I don't know how old you are so here are two links:
http://www.deltasigmatheta.org/inside.php?id=0305PD
http://www.deltasigmatheta.org/inside.php?id=0305PDG
Locate the nearest alumnae chapter and see how they are implementing the Delta Academy or the Delta GEMS (depending on your age). Also ask if the alumnae chapter is sponsoring a Jabberwock and if you are eligible to participate. They can also tell you about whether there are some collegiate chapters that mentor young girls.

These are good mentoring opportunities that aren't like "future Delta" or "mini-Delta" programs. So if you're looking to act like you're in a sorority or automatically be a Delta when you get to college, you will be sadly mistaken.
Best of luck and stay on the right track with your personal, scholastic, and service-oriented life.