__ = slide

b= bend

b*= double bend

^= overblow

You need to listen the song first if you want to get the timing right.
When bending, you have to make bend high and low for extra flowing sound.

-3 __-6 -6b -6 -6b

-4 -5 -6 -6b* -6

-5b -6 -6b -6 -6b -6 -6b -6 -4 -4 -4 -5

-4__-6 7 7^ 7 -7 -6 

-4__-6 -6b -6 -6b -6 -5

-3__-6... -6b -6 -6b..-6 -6b -6 -6b -5 -4

http://www.last.fm/music/Supertramp/_/School 
Harmonica part starts at 50 sec.