As a child my English teacher stressed continuously that we need to pronounce correctly the word "two" and "chew", pointing out that English-speaking people would hear a notable difference in their pronunciations.
According to the American Heritage Dictionary, Oxford Learner's Dictionary, and as you'll be told by most native English speakers here (I believe), they are pronounced differently:
Whether there are some English accents in which the two words are pronounced the same, I can't say. The fact that your teacher specifically mentioned to distinguish the two sounds suggests to me that where you're from some or many people tend to merge the two pronunciations. To me it sounds like a strange question to ask, but that's likely because I don't know anyone that pronounces those two words the same.