Concertina teachers, mostly in the UK
Instruction books for concertina and online courses, compiled by Gary Coover at concertina.net
Free online concertina learning resources:
All concertina systems
What kind of concertina should I get?
All-systems video workshop with Cohen Braithwaite-Kilcoyne
VIdeo instruction to get started playing Anglo, English or duet concertina by ear from concertina-academy
Anglo concertina
How to Play the Anglo by John Kirkpatrick: parts 1. 2, and 3
Anglo concertina Compact chord chart
Anglo concertina instruction methods and more at concertina.com
English concertina
Harry Minting’s English concertina course
Martin Henshaw’s English Concertina Workshop for Absolute Beginners [originally distributed in CD format, so some of its wording may still reflect that]
Alistair Anderson’s Concertina Workshop Tutor for the English Concertina
English concertina instruction methods and more at concertina.com
Duet systems
Brian Hayden’s Duet Concertina Workshop Tutor for all duet systems
Maccann Duet instruction methods and more at concertina.com
Crane, Hayden and Jeffries Duet instruction methods and more at concertina.com (scroll down the page to “Other Duet Systems”)