Aptitude tests are a useful resource to predict which students will be better at learning languages.

The idea of what a "good learner" varies among times and cultures.

Being aware of learning styles helps teachers to better cater for Ss' needs

Levels of English are standardized and global.

"The plateau effect" is desirable, especially at an intermediate level.

Teachers should adapt content, language and methodology to Ss' ages and levels of English.

Multiple Intelligences Theory and Neurolinguistic Programming are two theories that try to explain individual variation.

Intrinsic motivation comes from an external source.

Extrinsic motivation comes from an internal source.

Comfortable environments help lower students' effective filter.

The idea of Comprehensible Input was developed by Krashen

Comprehensible input means that all ss need to understand what the teacher is saying