Preview the text with students. Ask the students to look for unfamiliar words.
Tell students that when they come across a word they don't know, they should look for parts of the word that they do know. Identify any prefix or suffix that may help decipher the word's meaning.
Give students a couple of words to practice on before they practice independently.
Instruct students to use the other words in the sentence to help determine meaning.
Read and discuss the sentence again once meaning is determined, to prove comprehension.
Keep a journal of troublesome words to revisit at a later date for practice.