Sounds like a great opportunity for you.
The nice thing about this type of work is that if you show initiative- you’ll get more responsibility. So not just working one on one with kids, or demonstrating a particular technique or problem. But helping the actual teachers with the lesson plan, trouble-shooting when you see that a chunk of the class isn’t understanding the material, finding a more vivid or compelling way to get the material into logical chunks.
Good for you! I bet you really enjoy it!