A form of meditation made popular by John Lennon and his band mates during the "flower power" era has been found to improve students’ grades.
A study of school pupils found that performing two 20-minute sessions of Transcendental Meditation each day improves academic achievement.
The practice involves sitting still with eyes closed while chanting a mantra – also sometimes derided as “oming”.
It became synonymous with hippy culture in the 1960s after The Beatles embraced it following a visit to India where they were taught the technique by the late Maharishi Mahesh Yogi.
Now a growing body of research is suggesting it can have a positive effect on people’s lives.
Recent studies have shown that it can be used to treat high blood pressure and help people overcome psychological problems.
The latest research found that US school pupils who performed the meditation technique had higher graduation rates than those who did not.
The effect was even greater among those who had the lowest academic grades, the research conducted by the University of Connecticut and Maharishi University of Management, Iowa, found.
Researchers found that Transcendental Meditation increased the number of students graduating by 15 per cent while among those with the lowest academic grades, a further 25 per cent graduated compared to those not meditating.
Professor Robert Colbert, from the Neag School of Education at the University of Connecticut, said: "Transcendental Meditation appears to hold tremendous promise for enriching the lives of students."
He added that the meditation technique was a viable method for turning around "poor student academic performance and low graduation rates".
Sanford Nidich, a professor of education at Maharishi University of Management who conducted the research, added: "These results are the first to show that the Transcendental Meditation program can have a positive impact on student graduation rates.
“The largest effect was found in the most academically challenged students.
“Recently published research on increased academic achievement and reduced psychological stress in urban school students may provide possible mechanisms for the higher graduation rates found in this study.”
It is estimated that around 6 million people now practice Transcendental Meditation around the world.
The technique aims to concentrate the mind inwards by uttering the mantra and is intended to empty the mind of thoughts and feelings.
Proponents of the technique claim it can aid concentration and help to rid them of negative emotions.
The Beatles' time with Maharishi Mahesh Yogi, at his teaching centre in the foothills of the Himalayas in 1968, produced some of the most famous images of the Fab Four, dressed in white and draped in flower garlands.
It was also one of their most productive periods musically, with Lennon declaring that between them they wrote around 30 new songs during their visit to Rishikesh.
The tracks, which ended up on The Beatles, also known as the White Album, and Abbey Road, include Back in the USSR, Blackbird, Revolution and Mean Mr Mustard.
In an interview conducted in 2009, Paul McCartney and drummer Ringo Starr spoke candidly about how the meditation technique helped them.
Starr said: "Since then, sometimes a lot, sometimes a little, I have meditated. It is a gift he [the Maharishi] gave me."
McCartney added: “It wasn’t all about meditation, it’s just you were focused – but yeah, there were very blissful moments.
"It is one of the few things anyone has ever given to me that means so much to me. For us, it came at a time when we were looking for something to stabilise us at the end of the crazy sixties."
McCartney has also in the past called for Transcendental Meditation to be used in schools.
He said: “I believe that in the future meditation could be as commonplace in schools and society as eco-awareness is now. It interests me that an ancient cure may be the solution to a modern problem.”
The new research, which involved 235 students in their senior year at an urban school on the US east coast, was funded by the David Lynch Foundation, which has been campaigning to have meditation incorporated into the school day.
They claim that where meditation has been used in schools, it has helped to reduce stress and anxiety in pupils while also lowering suspension rates.
The foundation was set up two years ago by film director David Lynch after he used meditation to overcome his own anger issues.
Describing the difference it has made to his life, he said: "When I started meditating I had a real anger in me, and I would take this out on my first wife.
“Two weeks after I started meditating, this anger lifted."