Focus on teaching one letter each week so your students thoroughly learn the entire alphabet. Center the entire week's classroom activities on the letter of the week. For example, if you are teaching your preschoolers the letter "R," paint pictures of rainbows, eat raspberries in class and read a short story about rhinos. Write the letter "R" on a poster board and hang it in your classroom. Your students should recognize and be able to pick out that letter from a series of letters or words.
Write down each student's name on an index card and help the students practice writing their names. Say each letter as the child writes so he learns not only what each letter is called, but what it looks like. Encourage your preschoolers to write their names as frequently as possible. Help the students label their cubbyholes, worksheet papers, art projects and lunch bags. Don't worry if a student struggles to memorize how to write her name, as sometimes preschoolers find this very difficult. Let the students carry their index cards around to copy their names from as needed.
Give your students paper and crayons, markers or pens to practice their writing. Let students scribble or draw freely but remind them to try to write some letters or even their names. This relaxed approach to writing helps preschoolers recall the letters they have learned but also encourages them to become skilled at holding and handling writing utensils.
Practice drawing shapes, squiggles and lines with your students. (See Reference 2.) Some letters require straight lines, while other letters incorporate circles, loops and dots. Practice forming different shapes with your students to help them better form their letters.