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
Bank holiday - The name for a national public holiday in the UK, Ireland and some other places. Most people do not go to work.
Half-term - A short break in the middle of a school term. Usually one or two weeks.
Fatal - Deadly.
Currents - The continuous movement of water, which can be caused by wind, tide and differences in water density.
Blood vessels - Channels that carry blood through your body.
Rapid - Very quick.
Required - Something needed for rules to be met.