Medical Moments - Head Knocks
Children and adolescents are among those at greatest risk for concussion. Concussions can result from a fall, 
or any time a student’s head comes into contact with a hard object, such as the floor, a desk, or another student’s head or body. The potential for a concussion is greatest during activities where collisions can occur, such as during sport lessons, playtime, or school-based sports activities.
Students may also get a concussion when doing activities outside of school, such as weekend sport, but then come to school when symptoms of the concussion are presenting. Concussions can have a more serious effect on a young, developing brain and need to be addressed correctly. Proper recognition and response to concussion symptoms in the school environment can prevent further injury and can help with recovery.
For this reason, we have protocol at school that any bump to the head, a parent will be called to be informed. Often these are just little bumps and we can monitor and keep parents in the loop throughout the day if any changes occur. Most of the time, these are the cases that occur and are mild. Sometimes however, cases might be more moderate with signs of concussion not presenting until later that day/night or even the next day.
The site below provides useful information regarding general advice for head injuries that I would encourage all parents to read.