Martinez backs Stones and Barkley to be part of next generation.
Roberto Martinez says Everton will do all they can to help provide Roy Hodgson with the next generation of England players.
has been among several young Lions thrust into the mix during the World Cup in Brazil and despite their early exit from the competition, the FA are committed to embedding fresh talent into the senior set-up.
Defender John Stones
almost made the flight to South America having been first on the standby list and many pundits have called for the 20-year-old to start when England's Euro 2016 qualifying campaign kicks off in September.
And Martinez told evertonfc.com: "From our point of view, we always pride ourselves on helping the England camp as much as we can in producing good youngsters and making as many available as possible. That will always be the case.
"It's always good to see players from Everton representing the national team and in the case of the youngsters, we're very excited about the ones we have.
"We're going to protect and develop John, Ross and the others underneath to fulfill their potential because they're going to have a terrific future for England and the English game in general."
Successive 2-1 defeats to Italy and Uruguay ensure England are unable to qualify from Group D, even before Tuesday's game against Costa Rica.
And while the lack of points and a place in the knockout stage may put a dampener on festivities in Brazil, Martinez is keen to highlight pointers to progression.
"I don't view things for England in the short-term," he added.
"I look at different aspects and signs and I was really impressed with many of them. Looking to the future, this World Cup is going to really help the players to be successful in the European Championship or next World Cup.
"Of course, you want to win games and progress but this tournament was to look at other things for the future.
"I thought the attitude in both games from the England team was very positive, playing eye-to-eye with really experienced sides and the benefits of that will be there."