One of the basic tenants of real estate investing is that you want to own the smallest, most rundown house on the block, the theory being that the value of surrounding homes will inflate the value of your tiny home. The reverse is also true: the value of the most beautiful house on the block can regress to the mean of the shacks flanking it.

Now let’s talk about your children. In terms of mathematics skills, is your child a mansion or a shack? (Note: You’ll probably want to avoid sharing this assessment.) Now the next question is what happens when you *pair *your child with a mathematical mansion or shack – how are your child’s math skills affected by friendships with kids who are better or worse at math than he/she is?