Calgary's Minor Hockey Week just started. It has 12 000 players and ove 700 teams. There is a good article on it at.
http://www.calgaryherald.com/sports/Puck+drops+Esso+Minor+Hockey+Week+tournament/2470431/story.html
Dr. Mike Bracko does a lot of research into skating and has written many article. This is a good one about stride length and arm swing, recovery, body angle etc.
Hockey Coaching ABCs - Forum
https://www.hockeycoachingabcs.com/forum/viewtopic.php?showtopic=432