they are going (or go) to school
It means: "we have it in school"--- en la escuela la / lo tenemos...In school we have... en la escuela tenemos...
You probably mean, "...que aprendes en la escuela?" This mean, "... that you learn in school."
"Estas en la escuela" in English means "You are at school."
"Como van a la escuela" in English means "how do they go to school."
"En la escuela los alumnos" in Spanish translates to "In school, the students."
"Quién escribe en la escuela" translates to "Who writes in the school" in English.
at school is 'en la escuela, a la escuela'
En la escuela --- at school to school --- A la escuela
"Cosas para hacer en la escuela" is Spanish for "Things to do in school"."Cosas para hacer en casa" is Spanish for "Things to do at home".
It means: what do you learn in school?
How are you in school? (probably talking about your grades)
"Estudias mucho en la escuela?" Do you study a lot in school?