Book IV of PIANO PATTERNS: Double Thirds & Chromatic Double Thirds
a) Scales in Double Thirds - see below.
b) Scales in Chromatic Double Thirds - not illustrated
Book IV provides technical material for students who are of an intermediate standard.
Scales in Double Thirds and Chromatic Double Thirds are definitely not for beginners - not that they're easy for anyone - but the Filled in Notation does help with remembering which notes are black and which are white!.
Please to BOOK V (Blank Visual Aids for student's use)