The part of my daughter's shower with the shower head is constantly in need of repair. Not sure if they spray it on the sheetrock or what, but this is the 3d time I've had to replace the rock. Is there an alternative replacement for sheetrock (i.e. finished plywood) or is sheetrock the best way to go?

jpdg12

Try this James Hardie North America - 1-888-jhardie (http://www.jameshardie.com/backerboard/homeowner/hardibacker500.php)
You can get it at the local borg

The part of my daughter's shower with the shower head is constantly in need of repair. Not sure if they spray it on the sheetrock or what, but this is the 3d time I've had to replace the rock. Is there an alternative replacement for sheetrock (i.e. finished plywood) or is sheetrock the best way to go?

jpdg12
You bet there's an alternative. Replace the sheetrock with tilebacker (cement board). Install ceramic tile, grout it, caulk tile to top of shower (use silicone caulk).
Do yourself a favor and have a tile contractor do it.