Khan Academy produces an excellent array of videos which can be very helpful for students (and parents trying to figure out how to help). There are many other excellent sources of math help videos, as well as (*ahem*) my own YouTube page of video support, MysteriedMath.
While there is no usage requirement or assigned curriculum through Khan Academy for my classes, we are using the "Chalktalk" platform for ACT Remediation classes and considering some elements of it for Geometry, and Khan Academy videos are sometimes recommended by "Chalktalk" for additional support.
I have no plan to require regular participation in Delta Math modules or lesson plans by my Geometry or ACT Remediation classes, but I will occasionally build exercises in its platform, especially for any NTI days we may face. I will also occasionally include exercises which are developed through Quizizz, Blooket, and Gimkit.
The Desmos graphing calculator is a brilliant aid in helping students picture and manipulate the objects we will be dealing with in Geometry and ACT Remediation. The bulk of class time will be spent using the TI-84 calculator, and Desmos will not be allowed for our own tests and quizzes, but as we approach ACT (or SAT?) testing dates, it will become necessary to discuss which calculators are permitted and to what degree. Either way, I encourage all students to explore Desmos on their own as they practice the skills we cover. It REALLY helps with visualization of the content and ways we manipulate it.