As a start, I think the resources recommended in Question 63 below (https://www.blendedlearning.org/directory/forum/question/63) should be helpful. If you're a school leader or even an instructional coach, I'd also suggest Leading Personalized and Digital Learning by Mary Ann Wolf, Elizabeth Bobst and Nancy Mangum. https://www.amazon.com/Leading-Personalized-Digital-Learning-Implementing/dp/1682530914 My colleague Julia Freeland Fisher recently spoke with the authors about some of their tips in this blog:https://www.blendedlearning.org/a-school-leaders-guide-to-personalized-learning/
Good day my friend! I think this (https://blog.weevur.io/everything-a-learner-needs-to-know-about-blended-learning-models-e39d861da780) might be a good help for you and your friend teacher to implement blended learning models.
The BLU blog has great advice, as well as the ISTE and iNacol websites
Make sure you know the goals for the teacher, especially what she wants for her students. Is she trying to get more individual time with students? Is she trying to have a system for the students to turn their work in easier? Is she wanting to "personalize" the instruction for students. The true measure of a truly blended classroom is what the students are doing, not the teacher. Hope this helps.
I highly recommend checking out a few exemplar models to see how different schools have approached this. Out org, The Learning Accelerator, has some deep, strategy level profiles of a few pre-Algebra and algebra approaches, including DTA Middle School (https://practices.learningaccelerator.org/see/renew), LPS Richmond HS (https://practices.learningaccelerator.org/see/lps-richmond), and CISCO junior high (https://practices.learningaccelerator.org/see/cisco-junior-high-school). We attempted to really pull apart each approach to show how each school approaches data use, mastery learning, and personalization through blended means. Hope these are helpful!
Also, if you're interested in just how to generally get started with a basic rotational model, we've compiled a helpful guide to thinking about the culture, space ideas, and routines you might need to get started here:https://practices.learningaccelerator.org/problem-of-practice/how-do-i-set-up-a-station-rotation-model-in-my-classroom