Help is there a online training or a book that teaches score keepers how to keep score?

Yes!

Sorry, Willie, couldn't help myself.

Try the link below. At the bottom of the page that you get, you will see a link in red to "instructions to scorers and timers.." Hit that. it should help you. It is a pdf file, though, so you will need Adobe Acrobat.

http://www.nfhs.org/rules-basketball.htm

JR... From the way I read it I think he is looking for how to do the book because it says how to keep score... I may be wrong though, happens a lot.

If so, there is usually a set of instructions inside the front cover of good score books and the first 2 pages are filled out as an example. Can't say I have seen anything online though.

That site has great instructions on how to keep the book and the clock, i keep a copy of them in my bag at all times, and if a table official is unsure of his/her duties i'll give it to them to look over. I find it really helps for them to have written instructions to make reference to during the game if they are unsure of anything.