If not for anything else, please rethink everything for your own selfish greedy desire of raising a high performing child. Because your current method isn’t working. Or else you wouldn’t have asked for help. Neuropsychologists found out that human brain learns when it is either happy or extremely sad. The latter only works for short term with harmful side effect. Keeping a child happy at all cost is the best, and the only way to make a motivated learner, an essential method of raising a high achieving child with fully developed potential for the long term.