Book Summary10 to 25, by David Yeager

1-Page Summary1-Page Book Summary of 10 to 25

Working with young people isn’t always easy, but it’s one of the most important jobs in the world. So why do we often struggle to connect with, motivate, and guide them to reach their highest potential? In 10 to 25, published in 2024, David Yeager writes that conventional approaches to mentoring (teaching, parenting, coaching, and so on) rest on the assumption that young people are basically incompetent, impulsive, and unconcerned with the consequences of their actions.

But this is wrong, Yeager says, and mentoring methods based on these assumptions fail both us and future generations. In reality, young people only appear impulsive and careless because between the ages of 10 and 25, their brains are wired to care more about social standing and the respect of their peers than schoolwork or abstract future goals. So, to become better mentors, we must harness young people’s natural social motivations rather than treating them as obstacles to overcome. By giving them gracious guidance while also expecting a lot from them, mentors can help young people reach their potential and contribute to the betterment of society.

Yeager is a professor...

10 to 25 Summary What We Misunderstand About Young People

To begin, we’ll introduce what Yeager says is the main problem preventing parents, teachers, and others from becoming better mentors: the neurobiological-incompetence model. We’ll define the model, explain why mentoring approaches based on it don’t work, and discuss the key insights that can help us leave this model behind.

The Neurobiological Incompetence Model

According to Yeager, conventional wisdom in Western culture says that young people are basically impulsive, bad at thinking for themselves, and unable to make good choices.

This perspective rests on 20th-century scientific findings that the adolescent brain lacks a fully developed prefrontal cortex (the part of the brain that governs decision-making). Studies have also shown that the limbic system, the brain’s seat of emotion, is more active in young people than in adults. These findings have led to the idea that young people can’t control themselves, so they need adults to tell them what to do. In other words, we assume that young people are neurobiologically incompetent—that their brains don’t yet work as well as adults’ do, so they can’t behave properly.

(Shortform note: By calling this the...

10 to 25 Summary Better Mentorship Starts With Better Understanding

So far, we’ve seen how conventional mentoring approaches assume that young people are incompetent, impulsive, and in dire need of adult guidance. In this section, we’ll look at how Yeager flips the script by explaining that young people are in fact quite capable—they just have developmental needs and drives that conventional wisdom doesn’t take into account. By addressing these needs, mentors can help them channel their natural drives productively.

Young People Have Social Developmental Drives

Yeager writes that young people aren’t incompetent, they’re just focused on—and motivated by—different things than we think. From ages 10 to 25, a young person’s basic drives are socially oriented. What they want most is to find their place among their peers, explore their individuality and identity, and earn status and respect in their social environment. This is why, for instance, many teenagers seem not to care about school. Getting good grades has little to do with whether their friends like them or whether their crush thinks they’re funny. At worst, caring about school can lose them social status, because often their peers see it as uncool.

(Shortform note: Are there...

10 to 25 Summary Putting the Mentor Mindset to Work

Up to this point, we’ve seen what kinds of mentoring approaches fail and what Yeager suggests doing instead. In this section, we’ll dive into his practical recommendations. These include being transparent, using effective questions, and helping young people understand stress, purpose, and belonging.

Be Transparent

First, Yeager explains that you need to be transparent about your intent to mentor a young person. Because mentors are older than mentees, there’s a power disparity in the relationship, and too many adults condescend to young people. To prevent such miscommunication and build trust, say upfront to the young person you’re working with that you believe in them and are only there to help them improve. This sends the message that you’re an ally, not someone who sees them as a problem. You should repeat these intentions when things get tough, reminding your mentee that you’re there to support them through any hardships they face.

For example, a teacher might tell his students on the first day of class that he expects a lot of them, but that they can always come to his office for extra help. He’d say that he knows they can succeed, even if it’ll take hard work,...

Shortform Exercise: Apply the Mentor Mindset in Your Life

Think of a young person in your life (age 10-25) who you’re trying to guide or mentor—whether as a parent, teacher, coach, or in another role. This could be someone who’s struggling academically, behaviorally, or with motivation.

Describe the current situation with this young person. What specific challenges are they facing, and how have you been trying to help them so far?