As so often happens, the first shall be last, and the series within a series that started with Chess Curriculum Inventory (June 2015), ends with the first item on the initial short list. From the first post in the series, Chess Curriculum (April 2015) :-
No.1: ChessKid.com's Curriculum! • ChessKid.com is a spinoff of Chess.com and the download link leads directly to that site. The downloaded ZIP file creates five sections with a total of 20 lessons. The introduction says,
With the ChessKid.com Curriculum we set out to create an original, creative and extremely "kid friendly" way of learning the game of chess! While acquiring knowledge of the rules, basic fundamentals, as well as advanced strategies and tactics – coaches and beginning chess players alike will enjoy working through these lessons.
From the inventory:-
No.1: ChessKid.com Curriculum - Welcome & Introduction • Daniel Rensch, Co-Director of Content and Professional Relations • 12 pages (Introduction.pdf) • ChessKid_Curriculum.zip (-> Directory:ChessKid_Curriculum -> 5 Subdirectories = 22 PDF documents)
The last curriculum to be considered is also the most extensive. While I take the time to look through it in more depth, here's a recent video showing its author in an entertaining attempt to solve chess puzzles live.
23 Chess Puzzles In 23 Minutes (36:44) 'IM Daniel Rensch tries to solve 23 daily Chess.com puzzles in 23 minutes -- can he beat the clock?'