Bowdoin College chemistry lecturer Michael Danahy described the four high school students chosen to represent the US in this year’s International Chemistry Olympiad as “one of the strongest groups we have seen,” reports Chemical and Engineering News.

Danahy is among the mentors for this year’s team, which heads to Thailand on July 6, 2017, for the international academic competition. The four were chosen after an intensive two-week study camp sponsored by the American Chemical Society. “They came in really well prepared in all aspects of chemistry,” said Danahy.