Online go schools and teaching
Catalin Taranu 5o offers teaching game and game analysis via email.
Currently (November 2016) more than 2500 commented games. Need to "pay" with go4go credits; see the page for details.
1 dan professional Go player of the European Go Federation, teaching on KGS
Go lessons by A.Dinershteyn, 3-dan professional
Cornel gives lessons on IGS and KGS. He makes offline reviews and on his website there are his most recent games played at major tournaments. Cornel also gives classes over skype and to groups.