You are born with certain neural equipment, that neural equipment has a certain mental horsepower measured by IQ tests, and this is the horsepower you have to work with for the whole of your life.
Many people believe there is no such thing as becoming more intelligent in any fundamental sense.
To be sure, anyone can learn a great deal of practical value in accordance with his or her abilities. A fundamental challenge to this nativist position has developed in recent years among educators and psychologists. Many are coming to the conclusion that intelligence is, to a substantial degree, learnable. In addition to accumulating knowledge and skills, people can in a fully real and powerful sense become more intelligent. Not everyone agrees on this point.