His Doctrinale puerorum, a versified grammar, soon became a classic. It was composed around 1200, and was all written in leoninehexameters. Even after several centuries, with the advent of printing, it appeared in countless editions in Italy, Germany and France. It was based on the older works of Donatus and Priscian.
Alexander also wrote a short tract on arithmetic called Carmen de Algorismo—the Poem about Arithmetic, which also reached a wide distribution. A typical line from his Carmen de Algorismo, runs like this:
Extrahe radicem semper sub parte sinistra
Wherein he instructs his students: "always extract the square root by starting from the left". The poem is not very long, only a few hundred lines, and summarizes the art of calculating with the new style of Indian dice, or Talibus Indorum, as he calls the new Hindu-Arabic numerals.