My daughters 1995 has started to overheat while she is driving. i will replace the thermostat, but could there be something else i should be looking for.

Usually when the thermostat goes bad , it is in the open position, cooling the engine, not making it over heat. You can check it, but I would check for oil in the top of the radiator, and steam coming out the exhaust. When a head gasket goes, you can drive 300 miles without it overheating, then another day, you won't go 10 miles, then all of a sudden, it won't go at all. A radiator shop can do a compression check for you and tell you exactly what piston it is. If you are still driving it, keep an eye on the temp gauge, don't let it overheat, and carry water with you. Make sure the radiator is clean, inside, no rocks clogging up the tubes, no grass on the out side, no bugs, make sure it has coolant in it, not just water, and make sure the fans are working in city traffic, and the AC is working properly. For some reason, it will upset a radiator some times. Check it out.