Two distinguished educators, Dr. Timothy Rasinski and Dr. Edward Fry, have collaborated to develop the format for the Increasing Fluency with High Frequency Word Phrases series. This set of books brings together Dr. Rasinski's research on phrasing as a way to increase reading fluency and Dr. Fry's research on the most common words found in materials that students read at school. The series presents Fry's Instant Words, by grade level, incorporated into phrases. The phrases are then embedded into interesting texts which are practiced to increase reading fluency, emphasizing the importance of reading with expression (prosody), which leads to increased comprehension.