Swimmers at Mexico City's Acuatica Nelson Vargas participate in the 2015 World's Largest Swimming Lesson.
World's Largest Swimming Lesson Swimmers at Mexico City's Acuatica Nelson Vargas participate in the 2015 World's Largest Swimming Lesson.

Every year, several aquatics organizations pull together to present the World's Largest Swimming Lesson. This event is held not only to promote the lifesaving power of swim lessons, but also to break the standing record for the number of individuals who participate in a lesson globally. 2016 is no exception - and organizers are looking for host venues to participate.

For this year's event, which takes place Friday, June 24, organizers have made some changes intended to make participation easier. First, hosts will be allowed to pick their own starting times for the 30-minute lesson, as long as the lesson takes place on the designated day. Additionally, reporting criteria have been simplified. Organizers estimate that more than 500 facilities will participate in 20-plus countries.

As before, all hosts must teach the provided curriculum so all students will receive the same lesson on the same day. Additionally, each venue must have at least five students and at least one instructor who is certified by a recognized swimming instructor training program. The lessons must take place in a restricted area so an accurate head count can be taken. WLSL will provide marketing materials, certificates for participants, wristbands, safety information, and other materials.

WLSL set its fifth Guinness World Record™ in 2014, with 36,564 participants in 22 countries. In 2015, WLSL broke its own record, with 38,170 participants in 22 countries, though Guinness was not able to confirm it held the record.

According to organizers, more than 155,000 children and adults have participated in these lessons, which have yielded more than a half billion media impressions.

Registration to host a lesson ends Sunday, June 5.