I located a marriage document (1891) with the groom’s signature, which makes me curious about any formal and informal educational opportunities during that time period, and how they may have varied by

I located a marriage document (1891) with the groom’s signature, which makes me curious about any formal and informal educational opportunities during that time period, and how they may have varied by region and class. Is anyone familiar with any resources that might address this? I would be most curious about the Purisima del Rincon, San Juan de los Lagos, and Atotonilco el Alto areas.

Thanks