Mathew works for a US firm, but does his online tutoring services while seated at a computer in the southern Indian city of Cochin. Thanks to a high-speed Internet link, and software that lets him sketch chemical formulas onto a computer screen, Mathew can give 16-year-old Gaurav one-on-one online tutoring services from 8,000 miles and half a day away. ”I was skeptical at first,” said Gaurav’s mother, Nirmal, a developmental educator. ”But I decided to give it a sh......