How do you say tutoring?
Clases de consulta
In some places, tutoría
I'm actually a tutor at my university. We refer to it as "tutoring" however, the Spanish verb for "to tutor" is tutorar, so "tutoring" would be tutorando. I have also heard it referred to as tutoría escolar. tutorar is taken from www.rae.es
I hope this helps!
If by tutoring sessions you refer to the times at which students at a school or college can talk to the teacher, outside of class, it would be "horas de tutoría".