Mixed Size Education

The nature of children means it is unsafe for human and nonhuman children to interact. Nonhuman and human children of primary school age are not taught together, nor do they spend much physical time together. Most schools maintain a small simulation environment for educational purposes, and through this human and nonhuman children will meet and play together as a part of early cultural experience education. Through this, nonhuman children will meet human children in same-size scenarios as a way to reinforce positive experiences with humans and to instill into the young that humans are important, and friends, regardless of their size.
This means for many nonhumans that live in locations with low to no human population, their first ever experience with humans are same-size simulations when they are children. Different schools try to maintain consistent relationships over the extranet, ensuring human and nonhuman children stay in touch with each other through the years. Children that demonstrate the maturity will meet their human friends in true-size simulations by the end of their primary education. When possible, the schools will arrange a trip for students to physically meet each other at least once before moving on to secondary school.
Schools in population centers with students of both sizes in large numbers will have these students interacting, locally, in the simulations. They will see each other, physically, in certain locations based on the school's design, but they are kept separate so that nonhuman students will be unable to reach the human students.
Though many human children will physically experience nonhumans while growing up, it's not always the case for the nonhumans. In order to dispel the mystery of humans, the students will occasionally physically meet in highly supervised encounters. Human teachers will teach nonhuman classes where possible, and likewise nonhuman teachers will teach human students to better reinforce a lack of fear and the confidence to speak to nonhumans. Mature students will be physically interacting with human students by the end of primary school.
Once students reach secondary school, the student bodies will finally merge. At this age, the humans receive their mechs, and join their nonhuman peers in classrooms, though they are encouraged to be more outside of their machines, namely in the open air human parts of a classroom.
At the university level, the student bodies are entirely blended together, and human students are typically paired with a student guardian. A human university student could potentially do everything without their machine, such as heading to various buildings on campus, if the university is designed for such and their guardian is available when needed.