Scrabble has a game board, 100 letter tiles, a letter bag and up to four letter racks, depending on the number of players. On his turn, a player uses letters from his rack to form a word either across or down on the board.
To determine who plays a word first, place all the letters in the bag and each player draws one. The player who draws the tile with the letter closest to "A" goes first. A blank tile, which can be any letter, automatically wins the draw. Return the tiles to the bag, then each player draws seven tiles for his rack.
After playing a word, add the value of the letters to determine a player's score. That player then draws an amount of tiles equal to the amount he used to maintain a letter rack with seven tiles. The player to his left is the next to play a word. Create new words by adding to the letters already in play.
Blank tiles can be any letter, but they remain that letter for the rest of the game. Certain squares on the board multiply points for a letter or word. The game ends when the letter bag is empty, and a player uses all his letters, or there are no more valid moves available.
Agree upon a dictionary before the game. Only words found in that dictionary are playable.