Once the preflop betting round ends the flop is dealt. This is done by dealing the top card in the deck facedown on the table (it becomes the burn card), followed by three cards face-up in the middle of the table (see below).
Once this has been dealt the first post-flop betting round begins. The rules of a post-flop betting round are the same as a preflop with two small exceptions:
The first player to act is the next player with a hand to the left of the dealer
The first player to act can check or bet; as there has been no bet made, calling is free.
A bet on the flop is the amount of the big blind. In our game as described above, a player must put out 25¢ to make a bet.
Texas Holdem Betting Rules - The Turn
Once the betting round on the flop completes, the dealer deals one card facedown followed by a single card faceup, also known as the "burn and turn." Once the turn has been dealt the third betting round starts.
The third betting round is identical to the flop betting round with one single exception: The size of a bet for this round, and the final betting round, is doubled, meaning that to make a bet in our game will now cost a player 50¢.
Texas Holdem Betting Rules - The River
Assuming more than one player is left having not folded on one of the previous streets, the river is now dealt. Dealing the river is identical as dealing the turn with one card being dealt facedown followed by a single card face-up.
This is the final street and no more cards will be dealt in this hand. The betting round is identical to the betting round on the turn.