Should schools teach lessons in risk? A week of open water drownings has posed questions over why the young are particularly susceptible and how to stop further tragedies.
Warning as teenagers die in cold lakes
Tragic toll: Four families have shared pictures of their lost loved ones. Many other names have yet to be released. Glossary
River Tame - A river in the West Midlands of England that runs into the River Trent. It is one of several River Tames in England.
Blood pressure - The beating of our hearts keeps our blood at a certain pressure. This pressure can rise when we are stressed, as the heart beats faster.
Mandatory - Compulsory.
Free schools - In the UK: Schools that are funded by the government but are not run by local authorities. They can be set up by charities, universities, faith groups or others.
Academies - In the UK: schools that are funded directly by the government and run by academy trusts.