Much has been said about Sister Teresa (Mother Teresa to many) and her work in Calcutta (now Kolkata). The reality as we perceive from Calcutta is much different.

I would say the following article(s) better represents the truth than any other I have seen on the web.

Mother Teresa and missionaries
"According to many Indians [people living in India] she is exactly what is WRONG with western inspired Christian missionaries. Like many such missionaries she has a good heart. And she was doing well as a teacher. But when she became a medical missionary she started to mess things up, not due to her heart growing evil, but due to her supersitious religious views concerning things like the truth of her own faith above all others, are unequivocal opposition to contraception (which she viewed along with population control as evil) and her unequivocal praise of physical pain for the very people she treated (which she viewed as Jesus kissing them, and hence good), and the way she and her order grabbed headlines and monies when so many other charitable organizations were also doing good things, and the way she refused to spend the money that kept pouring in to her sisters of charity, on the poor, but just kept asking for more and more money and stockpiling it in bank after bank, and asking for yet more. Today her sisters continue to reuse the same blunt dirty needles on their patients, over and over again, not because they can't afford clean ones, but because pain is good for the soul, and, they continue to not give anyone any pain killers, again because pain is good for the soul, as Mother T. told the reporters, including a story she told of a man suffering terribly from cancer, she told him, "Jesus is kissing you," to which the man replied, "then I wish he'd stop." She chuckled after repeating the suffering man's genuine heartfelt response. Mother T. herself when she was ill, was treated to the most up to date and modern treatments, but the banks filled with monetary contributions to her work have tons of money that the sisters refuse to spend it to help relieve pain and suffering and to heal. Her sisters of charity basically amounted to untrained nuns, not even treating people medically, but just picking up people near death so they can wipe a wet cloth over their forehead and SECRETLY BAPTIZE THEM in the name of Jesus. And even those who survived usually got treated to having their wounds wiped by the same dirty rag that had just wiped a baby's bottom, or wiped another suffering person, or got treated to the same needle used on someone else."

In reality if you want to help the poor in India then contribute to charities which help the poor and needy people like Bharat Sevasram Sangha.

Here are a few other articles, which may be of interest to you:

India doesn't need religion, India needs food. We have enough religion to teach the whole world.