https://gizmo.ai/
https://www.omnisets.com/
https://knowt.com/
https://studykit.app/
Time management: https://www.marinaratimer.com/
Online lessons: https://www.khanacademy.org/
Mini lessons: Crash Course
The Learning Scientists: scientific research on learning for students and educators
How to Study Effectively: Handout PDF
How To Build Good Study Habits Easily (5:27 min)