My daughter is in middle school,Im not tryind to become a pro sports shooter,i dont know what ISO or CCD means I am simple a mother trying to get the best pictures of her daughter with what I can afford
That's great. Now you know you have some gaps in your knowledge that will effect how good your photos will be. I highly recommend reading your camera users manual, several times. It discusses ISO and other camer features you might fine useful.
No one expects you to invest pro $$$'s in camera gear. The point was that sports shooting gear, even for a mom shooting middle school sports, is not the cheap stuff if you want decent photos.
You'll find info about ISO (and exposure) here in this easy to read tutorial:
Camera Exposure: Aperture, ISO & Shutter Speed
and CCD image sensors don't perform as well as CMOS image sensors, which is why few DSLR cameras still use CCD's like the D3000 has.
If you leave camera settings decisions up to the camera, by using auto mode (the camera really isn't nearly as smart as you are), then you don't need to know about ISO and CCD.
ISO determines how sensitive to light your camera is. The higher the ISO setting the more sensitive to light it is, which is very beneficial when shooting indoor court sports, because though it looks nice and bright to your eye, it's a dark dungeon to the camera you have. That's where the image sensor type, CCD comes into play.
You still haven't mentioned if you are shooting indoor court sports or daytime/nightime field sports.