The Reading-Spelling Vocabulary Program (RSVP) is a list of 900 words of highest frequency selected from 14 previous studies of words in print, spoken vocabulary, and children's and adults' handwriting. The words are divided into four levels and 60 lessons of 15 words each. When a sample test was constructed and administered to 266 elementary school students, the results showed that (1) the level of difficulty ranged from grade one to grade nine, (2) mastery of the RSVP test was not achieved until students had achieved a ninth grade reading ability, and (3) the 60 lessons were generally in ascending order of difficulty. (The word list is appended, arranged by level and lessons.) (RL)