Teachers have been frustrated with the lack of parent involvement in the learning process, particularly in the earlier grades. Children spend about 26% of their time in school, sleep 40%, leaving about 34% of their time left over. Teachers believe that parents are not supervising their children's free time to encourage the learning process, such as basic literacy, which is crucial not only to later success in life but also to keep them out of prison; The 2003 National Adult Literacy Survey indicated that 70% of inmates in American prisons cannot read above a fourth grade level, which notes a "link between academic failure and delinquency, violence and crime is welded to reading failure."
