The band’s All Within My Hands Foundation & American Association Of Community Colleges will distribute $1.5 million To 15 US schools.
In response, the group wrote on Twitter: "Unreal! Thanks to the most dedicated fans in the world... you all are incredible!"
James Hetfield previously told Kerrang!: “I was pretty distraught when Lemmy passed. My vision of him was as a statue of a man that was immortal."
The film will now be returning for one more night in cinemas worldwide on 30 October.
The final donation came on 25 August, when the band donated a €63,000 cheque to Freezone Mannheim, a German homeless youth aid group.
‘Ride The Lightning’ injected a new sense of excitement into the stagnant scene of the early 80s and changed thrash metal forever.
It's become a tradition for Metallica to pay tribute to artists who come from the cities or the countries they are playing in.
From kit-bludgeoning belters to dependable backbeat-riders and technically gifted geniuses, these are the best drummers the world has ever known.
The metal titans donated to Dublin's Capuchin day centre which helps provide for homeless people and the ISPCC for children.
The exhibition will run from 18 June for a month and gives a never-before-seen insight into the metal titans' history.
The special, one-off event is to mark the 20th anniversary of the metal titans' 1999 live LP, 'S&M.'
The seventh annual Metallica night with baseball’s San Francisco Giants will take place on 26 April.
The metal icons' 2-hour performance included classic tracks from their entire career.
The prestigious award has been referred to as the “Nobel Prize for music”.
Previous winners of the prestigious prize include Elton John, Sting, Ray Charles, Bob Dylan, Led Zeppelin, Pink Floyd and Paul McCartney.