"Silent" Saturdays

Here is an excellent article on more reasons why parents (and coaches) should not yell instructions from the sideline during games: Why Sideline Screaming Can Stifle Your Child's Game.

In a nutshell: the players on the field need to figure it out themselves during games to really learn.

[Added 5/23/2009: I personally don't do truly silent Saturdays but do strongly discourage giving on field instructions during games. Spectators should focus on just cheering.]