[senco-forum] ADD/ADHD ?difference

I was under the impression that ADD/ADHD were different disorders, one quite
passive and one hyperactive. I was looking up ADD on the Internet today as I
have a child who is not particularly hyperactive (quite laid back really)
but has very poor concentration/attention. However all the sites seemed to
lump the two together as the same condition.

Can anyone steer me in the right direction to find more info.

Thanks
Kitty