American English File

Units	Level	Book	Term
12 <- 01	AFA		19
04 <- 01 08 <- 05 12 <- 09	AF1A AF1B AF1C		20 21 22
04 <- 01 08 <- 05 12 <- 09	AF2A AF2B AF2C		23 24 25
04 <- 01 07 <- 05 10 <- 08	AF3A AF3B AF3C		26 27 28
04 <- 01 07 <- 05 10 <- 08	AF4A AF4B AF4C		29 30 31
04 <- 01 07 <- 05 10 <- 08	AF5A AF5B AF5C		32 33 34