The 'All Schools Programme' was launched last year with the aim of showing rugby union is a game that everybody can play and that it is not just for elite schools - like Eton College where Prince Harry went.
More than 100 secondary schools joined the project in 2012/13, and 100 more have signed up for 2013/14. Overall, the RFU hopes 750 schools will benefit from the scheme.
Speaking at Twickenham, Prince Harry said: "There are so many good things about rugby. You've got to make rugby cool. I bet you can if you get your proper kit and put that up at school, you'll get more kids wanting to play."
More top news
Some 26 schoolchildren who went missing in the Brecon Beacons during a Duke of Edinburgh exercise have all been found safe and well.
Charaf Elmoudden went to the singer's four-bedroom house in north-west London last year and made off with goods worth more than £200,000.
The plea has been postponed in case where man is accused of dismembering a police officer he met on gay dating website Grindr.