Usages of tutear
En esa empresa prefieren tutear a todo el mundo, incluso cuando el primer trato parece muy formal.
In that company they prefer to use tú with everyone, even when the first interaction seems very formal.
Con la directora no nos tuteamos, pero con la profesora sí.
We don't use tú with the principal, but we do with the teacher.
Elon.io is an online learning platform
We have an entire course teaching Spanish grammar and vocabulary.