PATCHOGUE - Thousands of children at YMCAs nationwide jumped into the water today for the world's largest swimming lesson.

Here on Long Island, 35 pre-K students took part in a swimming lesson at the Patchogue YMCA to help set the Guinness World Record.

The large swimming lesson, sponsored by the YMCA, was done to stress the importance of children learning to swim at an early age. Swimming instructors say they also put an emphasis on water safety.

The YMCA of Long Island says it gives more than 22,000 swimming lessons a year.