South West Federation of Croquet Clubs - International Rules. Introductory and intermediate levels. Several good articles. Offers advice, coaching, and equipment hire to clubs in Gloucestershire, Avon, Wiltshire, Somerset, Dorset, Devon, Cornwall, Worcester and South Wales. - http://www.sausalito.demon.co.uk/
Croquet Canada Learning Centre - International Rules. Intermediate level. Various articles by different authors on selected subjects. - http://www.croquet.ca/learn/main.html
Jersey Croquet Club Tips - International Rules. Intermediate level. Fourteen interesting "problems" to solve with diagrams and answers. - http://www.mnlg.com/jcc/frames/coach/questionList.html
Maui Croquet Club Coaching - International Rules. Introductory to advanced levels. Advice, analysis, links, and problems. - http://www.mauicroquetclub.org/coaching/
Notes from Bob and Ted's Croquet Videos - American Rules. Advanced level. Concise advice on forty topics. - http://www3.bc.sympatico.ca/greenacres/croquetnotes.htm