 Essential Role of an EFL Teacher, Assessor A teacher cannot just teach a lesson and then move on. Teachers must assess each student's growth and mastery of the lesson objectives. This assessment can happen informally through classroom observation, or through formal methods like quizzes and tests. Expert teachers are able to recognize patterns in the test results of their students, and then plan their lessons to meet their student's needs. Thanks so much for watching. We are ITTT, the leading provider for TEFL and TESOL training courses. If you liked this video, please subscribe by clicking that button down here, and click on any of the videos here on the left for more interesting teaching tips for getting certified to teach English abroad and online.