Research shows that students who read daily improve their vocabulary and reading comprehension skills. A study by the National Reading Association found that students who read for at least 20 minutes a day scored 15% higher on standardized reading tests than those who read less frequently. In addition, reading regularly helps improve focus and memory by stimulating brain activity. These benefits demonstrate why reading every day is so important for academic success.
What is the purpose of the evidence the author includes in the passage?