The document outlines 10 principles for effective second language acquisition: 1) Instruction should develop formulaic expressions and rule-based competence. 2) Instruction should focus on meaning. 3) Instruction should also focus on language form. 4) Instruction should develop implicit knowledge while not neglecting explicit knowledge. 5) Instruction should consider a learner's natural syllabus. 6) Successful learning requires extensive input. 7) It also requires opportunities for student output. 8) Interaction is central to proficiency. 9) Instruction must account for individual differences. 10) Assessment should examine both controlled and free production.