This Intensive Intervention Practice Guide describes morphology and explains how teaching morphology can improve the reading skills of secondary-age students with reading and writing difficulties. In English, the spellings of words include information about both meanings and sounds. As a result, learning about morphology can help readers with word recognition (knowing the pronunciations and meanings of printed words). Good word recognition skills, in turn, contribute to better reading comprehension. It can also help with spelling (Perfetti, 1992; Seidenberg 2005; Tainturier & Rapp, 2001).