"just below glide path, begin descent"....for big planes this is the time to reduce thrust and start the process....
"Coming up, and on glide path"....for small planes this is the time to start.
"on course, on glide path"
"going left of course turn right 071"
"going above/below glide path"
"holding slightly above glide path"
"going well above glide path"
just examples of what you would hear on a typical day training students.