I have two problems. I've two Border Terriers, brother & sister who are nearly 3.the first problem is when I get ready to go out - they 'sing' and bark - I've tried the stuffed biscuit ball and just saying see you when I actually leave them.  They don't bark for long once I've left.  The second problem is when I come home - again they bark and the bitch especially launches herself at me and any visitors we may have. As the gasman, who had come to read the meter, said Oh a flying dog as she nearly knocked him off his feet trying to give him her squeaky mouse! Again I've tried  ignoring them when I get in, making her sit and then giving her a fuss, the boy tends to be a bit more laid back. 
I left them for short perionds when they were puppies and gradually built the time they were left up. I always make sure they've had a long walk, or at least a wee walk before I leave them, they are rarely left for more than three hours. apart from this they are great little dogs who've got their silver obedience certificates.

Does anyone have any suggestions on what else I can do or will they calm down as they get older?
Suem

When you leave the house you should ignore the dogs as you are going away, in this dont make any eye contact or fuss or even speak to them just shut the door. If they bark to talk just carry on with what you are doing.  When you return make your girl sit before you greet her dont give her any attention until she does as she is told.  If you keep repeating this process she should learn that she does'nt get any attention for leaping at you only when she sits and waits to be greet.  I can't see them calming down as they get older as they are already three, I'm afraid you will have to resort to some obedience work.  You should greet them when they do as they are told as this would happen when in a pack when the other dogs return from hunting, this is how they would get a prize like reguratated food, (thats not spelt right) anyway as long as she sits give her some nice phrase and a treat.  Good luck

Thanks for your advice Frank. I've been doing obedience with them and generally they are good.  Maybe I should  have gone in and out more when they were younger.  anyway I'll take your advice and persevere with the ignoring and sit.  Must say it is nice to have a happy greeting just slightly calmer would be great.

I know what it feels like years ago i had a collie and every time i left my flat he screamed and scratched like crazy at the door.

Good luck with your dogs, i hope you have loads of happy years together.