The Desmos-First course is part of Miyagi Premium. Module 0 and the first recipe are free with an account, so you can see how it works before you upgrade.
Miyagi · Digital SAT Math
Desmos-First
On the SAT's math section, students can use a graphing calculator called Desmos to help them with nearly every single question. Yet for some reason, SAT prep pretends it doesn't exist. There is using Desmos, and there is USING Desmos. With this course, you'll be able to raise your score by upwards of 50 points simply by utilizing a tool you've had all along.
Module 0 · The calculator
Module 1 · The recipes
Module 2 · Regression
Module 3 · Judgement
More
The recipes, all 1,421 practice questions, and every worked explanation come from Miyagi's internal tutor taxonomy and question bank, which scores roughly 62% of the SAT math bank as having a Desmos-first route. Modules 0, 2, 3, and the Triage page are written from SAT-tutor video transcripts and the r/SAT Official DESMOS Thread.