An uppercase recognition checklist should show each letter of the alphabet in a random order. If the letters are put into a traditional "A, B, C" pattern your child might be reciting the alphabet instead of actually knowing the letters. When the letters are out of sequence he must truly know the letter in order to identify it.
As with uppercase letters, display lowercase letters out of sequence. Lowercase letters look different than their uppercase counterparts, and some children have difficulty identifying the lowercase version of the letter. He might know what an uppercase "G" looks like, but be unable to identify a lowercase "g." This concept comes eventually, so do not be discouraged if your child recognizes one form of the letter but not the other.
Use a checklist to determine your child's understanding of each letter's sound. You can put this checklist in alphabetical order since you are not assessing the child's ability to identify the letters. Do not worry about testing your child on all of the different sound combinations that vowels make since that comes with time. Instead focus on the "hard" sounds of consonants like the "b" in "bee" and long vowel sounds like the "i" in "ice." (See Reference 2.)
Young children are still learning the fine motor skills it takes to make letter shapes. Ask your child to practice writing each letter on large lined paper. Give him an alphabet-tracing template to work on first if he has difficulty writing the letters. Use paper with 2-inch-tall lines since little hands have a difficult time making small letters at this age. You can go in alphabetical order or out of sequence when asking him to write letters. Make sure he knows the alphabet before asking him to write letters.