I think the sort of visualizations that are around on Youtube are great for those who don't "get" maths easily and need another angle to help them understand. A

I think the sort of visualizations that are around on Youtube are great for those who don't "get" maths easily and need another angle to help them understand. Although 3Blue1Brown is not for beginners there are other beginner resources. For example, this goes right back to basic algebra but is a very well explained with the afore mentioned visualizations. Veritasium - How Imaginary Numbers Were Invented https://www.youtube.com/watch?v=cUzklzVXJwo https://www.youtube.com/watch?v=cUzklzVXJwo