Help! How do I do this…

I am making a site for hockey team and other sports teams. I have made a seperate bit of the site for the players to login to see what the coaches have posted via wordpress. What I want is every time a coach/admin makes a new page/site, it will automatically email/notify each player. Can this be done within WordPress? Or do I need a extension? I know a little html and css. If possible, I would love as much help as I can get. If it a really long reply, please email me at [email signature moderated]