this is all good stuff but i meean specific excersises?

For teaching class, I choose my warm ups & cool down/stretches based on what we are doing that day. I suggest either taking a personal trainer course, or at least reading a couple boks like The Anatomy of Movement, the Anatomy of Movement Exercises, my brain isn't functioning well at the mo, but somewhere on this forum is a list of good books to start with. Once you have a firm grasp of what muscles are working to do different movements, you can tailor your warm up to target the areas you are working on. general warm ups, I like to start with stepping in time to the music, adding some head turns & tilts (not rolls), moving arms & shoulders, then I use mostly dance movements to warm up specific body parts, starting with big, general, range of motion movements, working in to tight, controlled movements that draw on the core, which leads me into the drill segment of my classes. I think it helps to first have a good concept of physiology & safe practices, then watch different classes/workshops. Ask what benefit each warm up gives & glean the good stuff, but be aware that just lifting someone's warm up without understanding yourself WHY each component is important probably won't be safe in the long run. You need to know how to tailor a warm up to individual and general class needs safely.
Good luck!

One thing to keep in mind when doing warmups for a class is to make sure (no matter what you're doing in class) to warm up areas of the body prone to injury. Even if you don't have issues with certain parts, your students might. Common areas of injury/problems:
1) Back
2) Knees
3) Ankles
4) Hips

At the end of class, make sure to get some good stretches in for:
1) Hamstrings & Glutes
2) Calves
3) Back
4) Ankles
5) Hips
6) Shoulders