Even though this being the case between high and low end classrooms, other aspects such as the child's background and living situation can play an important role in their development. Active children may thrive in the educational activities provided by a quality commercial care center, but according to the National Center for Early Development and Learning, children from low quality centers may be significantly less advanced in terms of vocabulary and reading skills. Classes are usually largest in this type of care, ratios of children to adult caregivers will vary according to state licensing requirements. Some positive aspects of commercial care are that children may gain a sense of independence, academic achievement, and socialization. Not only is this age crucial for the improvement of their social skills, but also it begins the stages of understanding a classroom setting. Childcare is seen as a reasonable option because it is different than parenting, since it can be seen as more of a routine for the child. This in turn will only have a negative impact on the child if the parent is not there for the emotional needs of the child. Children are placed into centers of socialization and learn many similarities and differences from one another from a very young age. Children are also placed into settings to develop their linguistics and cognitive abilities, which can be measured through observations.