This will help those who really want to progress in their learning of the piano/keyboard. If you want to learn to play in every key you must start out small. If you break down anything you learn into little pieces and play them in every key you will be playing in every key sooner than you think.
We all know music is made of progressions and one of the simplest progressions is the 1-4-5 progression. I have a midi of the the beginning the the song Lord I Lift Your Name on High. If you can play these simple 1-4-5 chords in the root positions you will be able to play this in every key.
You start out in the key of C. If you do not know all your major scales and what note is which degree, you will not understand what is going on. Its best after you have read this to type out the notes of the chords and learn their names.
Key of C
C maj, F maj, G maj
Key of Db
Db maj, Gb maj, Ab maj
Key of D
D maj, G maj, A maj
Key of Eb
Eb maj, Ab maj, Bb maj
Key of E
E maj, A maj, B maj
Key of F
F maj, Bb maj, C maj
Key of Gb
Gb maj, B maj, Db maj
Key of G
G maj, C maj, D maj
Key of Ab
Ab maj, Db maj, Eb maj
Key of A
A maj, D maj, E maj
Key of Bb
Bb maj, Eb maj, F maj
Key of B
B maj, E maj, Gb maj
cont...