Because Spanish school systems are quite different from American or British schools, they don't wouldn't go on a plus/minus system. They really don't even have A, B, C grades either.
Most Spanish school go on a 10 point system (rather then the American 100 point system) 10 being the best you can get and a 7 being border-line failing.
Because of the differences in school systems, it is better just to ask "Do you get good grades", since your definition of good grades will vary highly from a Spanish person's version of high grades.
Imagine if I went up to someone and was like 'I can't believe I got a 10 on this test! That's horrible." They are going to think I'm crazy because at their school, a 10 is the best you can get.
"Sacas buenas notas" is how you would say 'Do you get good grades' to someone in Spanish.
"School" in Spanish is "escuela".
To say 'I am going to school' in Spanish, you would say 'Voy a la escuela.'
To say 'I am going to school' in Spanish, you would say 'Voy a la escuela.'
This is how you say Saturday school in Spanish la escuela los sábados.
The school principal in Spanish is usually called the Director(a).
La escuela secundaria is high school in Spanish. Spanish(Mexico): Preparatoria
Escuela.
Escuela.
En la escuela
All it is in spanish is, Autobús escolar.
The Spanish word for "school" is "la escuela". Pronounced "es-KWEH-lah".
La escuela.