::Corpus::

A collection of texts, especially if complete and self-contained: the corpus of Anglo-Saxon verse. Plural also corpuses. In linguistics and lexicography, a body of texts, utterances, or other specimens considered more or less representative of a language, and usually stored as an electronic database. Currently, computer corpora may store many millions of running words, whose features can be analysed by means of tagging (the addition of identifying and classifying tags to words and other formations) and the use of concordancing programs. Corpus linguistics studies data in any such corpus.

If a texbook is Corpus based, we can already know that it is a good texbook. The thing is that Corpus is very important because it gives us a lot of information like frecuency. So, it means that the texbook have informationaccording to the current language. Usefull language, that the native speakers are using.

I think that it is very important for us as future teachers know about Corpus. We can see at school how children are learning things that are not useful at all. So, we can not make the same mistake with our future students, we have to teach frecuent language. We can ot teach "bathroom" anymore! beacuse native speakers don't use that word.

To sum up, I think that it is very important to learn about Corpus. Every teacher in the world have to know about this. I think that if we don't learn about how the word is changing every day we are going to make the same mistakes that our teachers at school. So, this is the time to change the world, and chilean education