Hang posters and signs showing the letters of the alphabet in lower-case forms only. Posters that show both lower- and upper-case letters might confuse young children. You may make these posters yourself by drawing the letters in large, colorful print. Hang the posters at eye-level for preschoolers.
Teach one letter per day. Focusing on one letter at a time allows children to learn at a slower pace and lets you be sure they understand each letter before moving on to new ones. Show children the letter of the day during morning group time. Explain what sound the letter makes and name some words that begin with that letter.
Ask children to find examples of the letter you're focusing on in magazines or newspapers. You also can hand out word searches and ask the children to circle all the examples of the letter. This teaches children to distinguish the letter from others. This is especially important for letter such as "c" and "o," which look similar to young learners.
Have children practice writing the letter you're teaching. You can make practice sheets by writing the letter repeatedly in dotted lines for children to trace. Once children have done this, let them get creative by using their fingers to trace the letter shape in paint or soft craft dough.
Use writing sheets that are specially designed to teach lower-case writing. You may be able to find these sheets online; if not, make them yourself. To make your own sheets, draw two parallel lines across the paper, then draw a dotted line that runs halfway between them. Demonstrate how to write the letter you're studying. Most lower case letters should fit between the bottom solid line and the dotted line.
Ask children to fill an entire row on one of these sheets with the letter of the day. Once they're done, they also can practice writing letters they've previously learned. Preschoolers won't have the fine motor control to write perfectly between the lines, but these sheets will teach them that most lower-case letters should be smaller than upper-case letters.