A teacher may find using homework as an assessment can also be useful, allowing it to provide feedback about a newly acquired skill that the student can practice at home (Christopher, 2007). When a child turns in their homework, it is important for the teacher to review it. A teacher will not know if a child has mastered a skill unless their work is checked for accuracy Vatterott, 2009, p.97). It is important for the teacher to assign work that is beneficial to each student. A classroom can be made up of many different skill levels and learners, and the work given needs to reflect the child's ability. Gerald LeTendre, the head of Penn State's Education Policy Studies Department believes that, "it is important to assign homework in a specific area that a child needs skill-building in and then review it to see if progress has been made" (Stevenson, 2009). A child will gain more from the homework if it is something that they need practice in or a skill they need to work on. It can also show the parents what their child needs help with, helping to keep them updated about what their child is struggling with at school. A teacher needs to take the time to decide what homework is needed by which child. That insures that the work being sent home is something that the child needs to be completing in order to improve on skills being taught during the school day.How much work to give is another hurdle teachers must face when assigning homework to their students. Children are participating in many activities outside of school, which can make finding time to do homework difficult. A parent wants a child to do well in school, but they also want their child to have enough time during the day, to have free time to play outside and be able to participate in other activities like sports. A teacher wants a child to complete their homework, but too much can cause both student and parent stress and frustration. This many make them view homework as not worth the headache. There are only so many hours in a day and a child that has too much homework may miss out on other activities or even sleep. The National Sleep Foundation believes that children aged 5 to 12 need 10 to 11 hours of sleep and a teenager needs between 8 Â½ and over 9 hours (Ponte, 2009). Children with busy schedules and too much homework may miss out on needed sleep trying to accomplish it all.