Plan de convivencia

You may say:

Coexistence plan

Clase the valores

The most accurate translation could be:

Personal, social, health and economic education (PSHE)

Personal, social, health and economic (PSHE) education has in various forms been part of the National Curriculum for schools in UK since 2000. It is a planned programme to help children and young people develop fully as individuals and as members of families and social and economic communities. Its goal is to equip young people with the knowledge, understanding, attitudes and practical skills to live healthily, safely, productively and responsibly.

Entregar las prácticas

Yoy may say:

To hand in your corsework 

Another way to say it would be:

Your coursework is due on Monday (when there is a deadline).

Cuando los alumnos están en fila...

When students are in a line you may need to say one of the following:

Agárrate a tu compañero: hold on (to the person in front of you)
Suéltale: let go (off the person in front of you)
Agárrate a la barandilla: hold on to the banister/rail.