Sure. You can do Groups Forward or Groups Backwards. Pick a point, it could be a few beats long or a few measures long. Practice the 1st group at least 5 times, slowly, getting everything correct. Go to the next logical group and practice 5X, getting everything correct. Then practice both groups together 5X; move on to group 3, 5X; then practice group 1-2-3 5x, always practicing slowly for everything correct. Don't count any incorrect repetitions.It is pretty much the same as chain. I think Groups Backwards (last 2m, then last 4m, etc. of the piece) is especially effective, to prevent learning the beginning much better than the ending.
Fun Repeats - Kind of a joke to my students - A teacher in our area says "From now on there will be no more drills. They are fun repeats."
Fracture practice came from a book by Charles Cooke, which we referred to as the "Cookbook" in college. A fracture is much like a group, only in fracture practice you must practice a little before + a little after. 5X is my usual rule, but it could be 10X or 20X. So practice the middle group first, the fracture, then move a little before + a little after the fracture, then further before + further after the fracture, like this: ( ( (Fracture) ) ) The goal is to work the fracture (the most difficult part) into what is easier, until you can fit it into the whole context of the section or piece.
Secure Links is just making sure the links between sections are secure.