I am not a fan of left and right brain theories. Women who have strokes recover speech because we use both sides of our brain to talk with while men use only one side.
Girls and boys are different in their mental make up.
I never duplicated what the schools can do. I showed my children what I knew, plant identification, how the human body functions, to read for comprehension. I took them to museums explaining about the artists and his career. We went to see famous dance companies and to the symphony and live plays. Sometimes we lived in out of the way places and had to drive hours to get to an interesting destination.
I took them hiking in nature. I travelled all over the USA and Canada with them and each one got to go to Europe.
When did all this enrichment begin? Around the age of three.
You have lots of inner resources start using them.