What I learned in high school while on every special team and field goal (no I wasn't just on special teams haha).
Inside leg goes behind your teammates outside leg, making a cross. Your outter arm shoots across. YOU BLOCK THE GUY TRYING TO RUN THROUGH YOUR GAP!!!
I saw about 5 guys fall forward and 6-7 Bears 3-5 yards deep in the backfield.
Stick to the basics, they come back to kill you in the end.