Parents usually correct young children when they make grammatical errors

People with high IQs are good language learners

The most important factor in second language acquisition is motivation

The earlier a second language introduced in school programs the greater the likelihood of success in learning

Most of the mistakes which second language learners make are due to first language interference.

Teachers should present grammatical rules one at a time, and learners should practice examples of each one before going on to another.

Teachers should teach simple language structures before complex ones.

Learners' errors should be corrected as soon as they are made in order to prevent the formation of bad habits.

Teachers should use materials that expose students to only those language structures which they have already been taught.

When learners are allowed to interact freely (in group or pair) they learn each others' mistakes.

Students learn what they are taught.