Gay-Guy must be on holiday because he normally jumps on these questions!
I don't have any experience with coaching or fitness training, so I went and googled 'rugby training drills' and these came up:
http://www.netfit.co.uk/rugby-cornwallwen
http://www.betterrugbycoaching.com
http://www.sport-fitness-advisor.com/rugby-training.html
http://usacollegerugby.com/resources/drills
I'll try answer some questions though.
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Another thing is we do practice our different line out plays and our switches with out backs.[/b]
The way I've always trained, forwards and backs did their plays seperately. Makes sense since there will be some hiccups whilst the players learn, so rather do it seperately or time is wasted. For instance if the hooker (number 2) keeps missing his jumper, it would be a waste for the backs to stand and waited for the ball. Rather let the backs refine their plays by themselves, till they can do it at full pace. When all parties have got the plays in order then make it a full team session.
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When it comes down to it when playing a high school game, we never use these skills. Are we waisting our time with these drills that help tune these skills we never use in a real game?[/b]
Highschools games tend to be more fragmented than what you see on the TV, so plays are extremely hard to perform in broken play. Only do plays from set pieces from now on. This should help ten fold. This however will depend on if your players have the basic skills already. Make sure you are not jumping too far ahead. You don't fine tune skills IN plays, they should be there already, plays should just focus those already acquired skills in different ways IMO.
For instance, you finally get the players to perform a play with the ball being passed from left to right. But then when you need to do it from right to left you find out that your flyhalf can't pass to his left accurately!
The skills need to be there already.
But this doesn't mean that you can't work around player weakness! Perhaps you can do a switch ball with the inside/outside centre to get around this.
Be flexible but prepared iron out things that aren't working effectively.
Hope it helps!