The list below organizes links to the video explanations of math questions in the official SAT content that Collegeboard has released for the new digital SAT which will be launched in spring of 2023.
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Digital SAT Practice in Bluebook
The four digital SAT practice tests can be downloaded from the Bluebook app.
Skills Insight SAT Tool
The SAT Skills Insight tool gives students examples of 56 math questions from the following domains: Algebra, Advanced Math, Problem Solving and Data Analysis, and Geometry and Trigonometry.
Video explanations: Skills Insight SAT
Digital SAT Sample Questions
Collegeboard has released 18 sample math questions for the digital SAT.
Video explanations: Digital SAT Sample Questions for Math
Linear (Nonadaptive) Practice Tests
I recommend that students practice with these tests(download link) after having completed the four tests in the Bluebook app. Please note that many of the questions from the Bluebook app are repeated in these linear (nonadaptive) forms.