In this technical report, the authors describe the development alternate forms of three types of early literacy measures as part of a comprehensive progress monitoring literacy assessment system developed in 2006 for use with students in Kindergarten through fourth grade. They begin with a brief overview of the two conceptual frameworks underlying the assessment system: progress monitoring and developmental theories of reading. They then provide context for how the three early literacy measures of Letter Names, Letter Sounds, and Phoneme Segmenting measures fit into the full assessment system. Subsequent technical reports provide similar information about measures of Word and Passage Reading Fluency (Alonzo & Tindal, 2007), Passage, and Reading Comprehension (Alonzo, Liu, & Tindal, 2007). Appended are: (1) Example Letter Names Test: Student Copy; (2) Example Letter Names Test: Assessor Copy; (3) Example Letter Sounds Test: Student Copy; (4) Example Letter Sounds Test: Assessor Copy; and (5) Example Phoneme Segmenting Test: Assessor Copy. (Contains 7 tables and 3 figures.)