What to teach in school? Non-Standard dialects of English or Standard English

Topic: How should students who are speakers of non-standard dialects of English be taught?
http://www.tesol.org/s_tesol/sec_document.asp?CID+403&DID+1061
Teachers should not teach in the non-standard dialects of English. English is the main language that mostly everyone knows and if the teachers tried to teach everyone in their own dialect, many more teachers would need to be hired because many more dialects would need to be taught. When the schools did try to separate the vernacular speakers, the parents protested how ELS placement was insulting and inappropriate because their children already spoke the English language and also that the teacher’s expertise is in teaching language and not teaching dialects.
Teachers teach the children everyday and after a while, the students sometimes end up listening to the teacher enough, they start speaking like the teacher speaks. A reason why students are not taught in the vernacular is because when ESL students interact with the vernacular dialect speakers, the ESL students will start to speak like the vernacular dialect speakers.
A teacher who has had more education of the subject they are teaching is able to teach more clearly. The reason why teaching in the vernacular would be a problem is because the teachers would have to go to school to become more educated to teach this class. Students who are able to see how standard English plays a role in their everyday lives makes them want to learn it more by themselves.

http://www.eiu.edu/~ipaweb/pipa/volume/katzstev.htm
I will be discussing how students leave and graduate school without a well-built foundation of understanding the Standard Dialect. Although many students just do not get their information because they do not care or they do not understand, some do not understand the Standard Dialect because they did not learn the Standard English.
When students are about 7 they start learning the very basic English rules. These rules, as the children become older, add onto one another and become more and more complex. The problem if a teacher would teach in the vernacular would be that if there were more than one dialect, each of the dialects would need to be taught. With each of the dialects needing to be taught, the class would get very behind and the students would not be able to go onto the next topic in the correct time. With just teaching Standard English, it is much easier because everyone has one basic language.
People are able to learn faster when they are just put into an environment where they are forced to speak the new language. This is referred to as immersion. Immersion is where a person is just put into a situation with a few people who do not speak the same language and this person is forced to speak this new language.