Piaget's Model of Intellectual Development states that during assimilation, we use our current schemes to interpret the external world. In accommodation, we create new schemes or adjust old ones after noticing that our current way of thinking does not capture the environment completely.
This theory applies to all children's learning. In teaching young children mathematics, teachers should not spoon feed them. Instead, teachers should provide young children with lots of experiences to engage in productive struggles. These opportunities help children to develop accommodation.