The "hand up, don't shoot" training is ideal and this should be taught in every school. Seriously, kids need to be taught exactly that. Have school teens rehearse it. TEACH KIDS HOW TO ADDRESS AND RESPOND TO POLICE.
TOP OF THAT LIST?
If the police are pointing a gun at you, remember that slogan "hands up, don't shoot." DO IT.
Hell, that should be a test question in graduation requirement tests.
Question: "What should you do if a police officer is pointing a gun at you?
A. Run like hell
B. Tell the officer to "go to hell."
C. Put your hands up and say "don't shoot."
D. Try to get the gun away from the officer
E. Put your hands in your pocket
Any student who doesn't get that one right has to take the civics class again.
That would eliminate nearly every instance of questionable police shootings.