One in six people are affected by dyslexia

Anglesey and Gwynedd councils are running the pilot project with 13 pupils aged from 10 to 12.

The treatment, called DDAT (Dyslexia, Dyspraxia and Attention deficit Treatment) involves exercises using bean bags, bouncy boards and wobble boards.

However the method has been criticised as unproven and expensive by dyslexia experts.

An average treatment using this method, which typically lasts a year, costs about �1,500.

DDAT was launched three years ago by Welsh entrepreneur Wynford Dore, who has made millions of pounds from previous ventures.

I'm doing this because it works, because it's needed, and because no-one else is doing it Wynford Dore

However, he has denied DDAT is a money-making exercise.

He told BBC Wales: "Some people assume because it's a business, the motives behind it can't be right, which is absurd.

"I'm doing this because it works, because it's needed, and because no-one else is doing it."

The treatment uses a physiological approach rather than traditional educational help favoured by the majority of dyslexia experts.

More than 12,000 people have already signed up to DDAT, with some claiming it has changed their lives.

James Warwick, eight, from Cardiff, has been on the course for six months.

I don't think anything will take the place of decent, specialist teaching Jane Owen

His mother Elizabeth said: "It's as though James has come out of a fog, as though he was living in some other land, and all of a sudden he's living in the real world.

Reading

But Jane Owen, of Dyslexia Institute Wales, believes parents of dyslexic children are vulnerable when it comes to alternative treatments.

She said: "I don't think exercise will transform a dyslexic's life.

"It can alleviate some of the problems but I don't think anything will take the place of decent, specialist teaching."

About one in six people have problems with reading and spelling because of dyslexia.

The pilot project in Anglesey and Gwynedd started in April.

The children taking part in it have their first progress check-up on Wednesday.