Determine the order that you will introduce letters. You might teach consonants and then vowels, or introduce most commonly used letters first like "m," "a," "s," "t" and "d." Check your reading program's curriculum guide. It will probably suggest an order.
Introduce letters in a specific sequence. For example display the "a" alphabet card, say the letter's name, and then say the sound. Then demonstrate the correct way to write the letter. This method teaches children that letters have corresponding shapes and sounds in print.
Display pictures or items that begin with the targeted letter. You can buy alphabet flash cards that have the letter and a picture already on them or you might display a real apple for the letter "a" and a bat and ball for "b." This helps young children associate letters with their beginning sounds.
Emphasize the targeted letter throughout the day. If you introduce the letter "d," encourage the children to tell you when they see the letter in the classroom, maybe on a poster or in a book. Have them look for items in the room that begin with a "d" like a desk or a doorknob and label it with a sticky note.