Complex sentence: In 1901, at 22 years of age, Caroline received her Teaching Certificate from Lebanon Normal School,--cite pierce--adn in that same year, Caroline started her studies in Zoology at the University of Missouri.
Split into simpler sentences: In 1901, at 22 years of age, Caroline received her Teaching Certificate from Lebanon Normal School. In that same year, Caroline started her studies in Zoology at the University of Missouri.