Here is an overview of the Major scale in the key of C, using the 3 notes per string system.
It can be useful to think about what fingers to use to limit the amount of positions switches per position. Mostly the trick is to start the lower strings with 1 2 4 if there is a whole step between the first 3 notes.

Practicing Scales and finding useful exercises
If you want to learn scales then you need to practice them in the right way. These posts will help you evaluate and improve how you work on scales in your practice routine
How to practice your scales and why – Positions
Practice Major Scales like this and you will get more out of it!
You can also download the chart as a pdf here:
If you have any questions or comments then feel free to let me know! You can do so by connecting with me via YouTube, Facebook, Instagram, Google+ or Twitter, or sent me an e-mail. Then you will also stay up to date with new lessons, concerts, and releases.
Jens,
Regarding the the higher strings when there is 3 whole notes, do you recommend 1, 2,4 or 1,3,4 fingers?
That depends on where you hand is placed when you get there, so that is different from position to position, but 1,3,4 is probably the most common.
thanks Jens