Endgame Tactics Time

Hi Chess Friends,

Tonight I had a talented student of mine play out a few endgames to practice converting good positions with the clock ticking. 

On his first try with one ending he found a key sacrificial idea, but played it too early and ended up down a knight for two pawns. In the end he found a nice tactic, which won back the piece, but resulted in a lost king and pawn ending. I've slightly modified the position so that his tactic works. Can you find the draw for white?