ESL job interview question: How do you know if you met objectives? What if you did not?

Recommended answers:

(1) I know objectives have been met through data collected through informal and formal assessments. I also give my students a questionnaire. Had the objectives not been met, I would revise classroom materials and try to achieve the objectives by using a different approach. 

(2) Every lesson I teach has closing in which I lead the class through a reflection of what was learned. Formal and informal assessments are also utilized through data analysis.