You've built scales from the stack; now meet its partner. This module adds the rectangle shape so you can lay down a major or minor pentatonic scale from any root — reconstructing all five familiar Forms — and pins down where the root, third, and fifth live inside each shape, the target notes that make a solo sound intentional. Along the way you'll pick up the language of intervals, memorize every D on the neck, and turn one simple scale drill into thousands of practice variations. It closes with the last single-chord workout of the course: improvising over a D7 vamp, trading bright major and bluesy minor phrases with call and response. A standalone lesson on effective practice — interleaving, spaced repetition, and focused blocks — sets you up to get more out of every session.