Watch the Major Scale Shape 1 Play-Along online guitar lesson by Rob Garland from Melodic Soloing: Major Scale
Use the fingering that I used in the demonstration, one finger per fret. Play the scale using alternate pick strokes. Look at where the first octave begins and ends, and also where the second octave runs from. Say the notes out loud as you play them (C-D-E-F-G-A-B-C). This will help you remember the notes on the neck. Play along with me at 72 BPM and 92 BPM.