"Vocabulary learning is effective when it entails active engagement that goes beyond definitional knowledge."
Stahl & Kapinus, 2001
"Instruction in high-frequency words known and used by mature language users can add productively to an individual's language ability."
Beck, McKeown, & Kucan, 2002
"Once students know what is expected of them in a vocabulary task, they often learn rapidly."
"Repetitions and multiple exposures to vocabulary items are important."