When introducing a new topic, such as language acquisition, present on the board two versions of the fact or theory, correct and incorrect: for example “It takes about one year to learn a second language fluently” and “It takes about five years to learn a second language fluently.” Have students discuss with peers and try to guess the correct version before presenting the correct one.
With this strategy, students are not only introduced to the topic but some common misconceptions on it it while practicing speaking skills.