1. If you want a smarter kid, teach your child to read as early as possible and instill in them a love for books. Because as soon as they can read, they can teach themselves. And that will be a life-long advantage over their peers who don’t have that same ability.
My mom told me at a young age that she would ALWAYS have money to buy me a book, and she always did. Kids could stay up as late as they wanted if they were in bed reading. We all all developed a great love for books.