 He taught at the Colegio de Santa Cruz in Tlatelolco along with Bernardino de Sahagún, Andrés de Olmos, Arnaldo de Basaccio, Juan de Gaona, and Maturino Gilberti Students at the school were also important.Juan Badiano, a student at the school, translated a Nahuatl herbal into Latin.Besides his clerical duties, Molina devoted himself to studying, understanding, and writing Nahuatl.