teaching English through English

I think "teaching English Through English" is necessary in public school English class. Before, English teachers in Korea did not pay attention to teaching the speaking part in English classes, but just paid attention on reading comprehension and what are going to appear on the exams. Today, however, many parents want their children to be both excellent in reading and writing and be fluent in speaking and listening. We live in a globalized world, we meet foreigners practically everyday especially at colleges, and we have more chance in communicating with them. In order to communicate with the foreigners, Koreans should not be afraid in talking with them casually. Most Koreans think speaking English is a hard task, but if we practice it everyday and get used to it, speaking would not be such a hard problem anymore. Therefore, "teaching English Through English" in public school English class is necessary. We learn our mother tongue first by listening, listening opens our mouth to speaking. If the teachers in public schools are fluent in English themselves, children would have much easier way in accessing a globalized world.
However, it is not necessary that all teachers in public school English class have to be native speakers of English. Of course, it would be beneficial to the students if the teachers are native speakers especially when it comes to pronunciation, and also because the native speakers have no problem speaking English thus no stress. But, today since the Teacher's Examination includes speaking English and in college, the professors view speaking as an important part of English Education, the graduate students of English Education are mostly fluent in speaking themselves and have no problem teaching English through English. It is just that it would be easier for the native speakers to prepare classes. Korean English teachers have more benefits in that they understand the students better since they used to be one of them sitting there, and that they can thus communicate better with the students.
I want to be a English teacher myself, so I try to think more about English education these days and the pros and the cons. I think in Korean English classes, students should be more involved in the classes, if the teacher speaks English only and let the students participate in activities, the students will get more interested in the language itself. People want to know more about something when they are interested in something. Letting students know that the college entrance exam is not the final goal of their life, but English has much more use later in life since it is becoming more like a huge globalized world today, and that it has potential, students will thrive to learn English. I think activities such as going outside to the playground or the park to write a poem in English about the nature, or writing English journal once a week, or having a discussion in English during classes will get away the stress students have about English and be interested in the class.