ChessKid.com

Chess Kid is a learning program designed for children by Chess.com.  It has no advertising, and limits social contacts. Excellent for Elementary children and beginners. Can set up a limited account for free, also available at a discount through some clubs.

Chess.com

An advanced beginning thru advanced site. Lessons, Situational Drills, Puzzles, Analyze games, Vision Practice, Openings, Chess News, Play online many formats including tournaments, KSCA Online Club for Kansas Students to play in online tournaments. Can set up a limited account for free, and most people will be able to get all they need for $25 per year. There are more advanced levels of accounts. 

ChessTempo.com

Very strong for practicing tactics and end games. Play guess the move in master games. Database of master games for study and Opening study.  Can set up a limited account for free, and most people will be able to get all they need for $35 per year. There are more advanced levels of accounts.

Chess24.com

Most complete chess news. For serious chess players. Not recommended for children. Can set up a limited account for free.  There are more advanced levels of accounts.

ChessGames.com

ChessGames.com: a tool designed to improve the chess knowledge and skill of all players, from novice to grandmaster. Hundreds of thousands of chess games, which you can review move by move in your web browser. Register for free.

Kansas Scholastic Chess Association (KSCA) Schedule

KSCA.US

Current schedule for the KSCA sponsored tournaments.