For the major scale with one flat in the key signature - F major - see this page: Basic major scales

For the following scales, notice how they all start on black keys, and consequently the fingering is different from the basic scales which start on a white key. It is not so practical to start with your thumb or little finger when starting on a black key, so a longer finger such as 2 or 3 is used instead.

I have demonstrated each scale hands together, however it is a good idea to learn them hands separately first to ensure accurate fingering and development of good habits, then put them hands together.

You can also find an updated version with better views of demonstrations of all major scales, including ones with flats, along with a method for working out the key signatures here.

B Flat Major Scale

B flat major has two black keys - B flat and E flat:

E Flat Major Scale

E flat major has three black keys - B flat, E flat and A flat:

A Flat Major Scale

A flat major has four black keys - B flat, E flat, A flat and D flat:

D Flat Major Scale

D flat major has five flats - B flat, E flat, A flat, D flat and G flat:

I have also demonstrated D flat major scale in contrary motion (all of the above scales are in similar motion). This particular scale is good to practice in contrary motion in order to develop your technique and coordination further: