If your daycare center serves breakfast or lunch, don't count on it being a balanced meal made with the freshest, highest quality ingredients. Most daycares buy in bulk for the cost-savings and then overcook the fare into shapeless submission. Unless they're serving pressed-meat nuggets that day, which as we all know, rarely deviates from the shapes they were stamped into upon mass creation.
Most daycares follow state regulations that map when meals should be served, but most nutritional requirements are lax and non-specific. What exactly does a "nutritious and balanced" meal mean? For some daycares, meals include processed foods. For others, only organic foods will do. Ask lots of questions about the foods, how they're prepared and how often they're served. If your child has food allergies or other dietary requirements that differ from the norm, be prepared to pack breakfast, snacks and lunch.
If a daycare's menu isn't up to snuff, you can try to make up for this lack of nutritional power by insisting on fruits and vegetables in your child's off hours. But it sure would be better if brain-building superfoods were served all the day through.