The “gap” is in “understanding” - that the teacher does nothing beyond the curriculum and class, while the parent does nothing outside of “providing” at home. Parents and teachers need to put in equal efforts to ensure overall education of a child.
Traditionally, parents and teachers interacted only once or twice a year to discuss “test-scores” and not the process or the learning journey. This meant that parents remained ill-informed about their child’s overall development and the school’s efforts. As a result, the children suffered the effects of misdirected efforts on the part of all the stakeholders in their development.