|Your requirements conflict with one another. Intel has the Atom which is supposed to be good on battery life but is kind of anemic in performance. Intel just announced a new design that is supposed to be good on battery life and better on performance.|
These netbooks are OK for Internet and running office apps. Games are not so good.
Some netbooks are using a larger battery with does have more life. I suggest you concentrate on what type of battery is included first then look at the other specs.
If you kids like to play fast paced games they will probably be disappointed with any mainstream Laptop, Notebook or Netbook as all are weak on gaming. They decend in the order I listed the classifications.
If this computer is to be used at home, aka, high school, I would recommend getting a desktop instead.