“Learn English 50% faster with native teachers.” That TV ad got me thinking if that was still really appealing to learners in Brazil. In other words, do people actually believe in that? A quick search on Google helped clarify things for me. There are several ads like that. Not only do they claim students will  “Learn faster” (there was even an ad which said “Learn 4 times faster”!), but they suggest it has been “proven” that it is only possible to learn “real” English with a native teacher!...