According to Barna Research, 64% of young adults who grew up in church stop attending by their late twenties. Lifeway found similar numbers: 66% of those who attended regularly as teens stop attending for at least a year.
But here's what's underneath those numbers: Pew Research found that while about 73% of those raised Christian still identify as Christian, roughly one in four have left the faith entirely. And for every person who converts to Christianity, six others walk away.
The church has spent decades asking why they leave. But maybe the better question is: why would they stay?
Recent research points to a clear answer: 84% of adults who had positive childhood experiences with faith remain in that faith. But among those who had negative experiences? Nearly 70% now have no religion at all. They didn't lose something they treasured. Many never experienced faith as something worth keeping.
We drop kids into Sunday School and teach them Bible stories as if belief is inherited. As if being in the room makes them Christians. We answer questions they haven't asked yet, and we skip the questions they will ask.
But kids become teenagers. Teenagers become adults. And somewhere along the way, they're going to sit in a dorm room or a break room or a quiet moment and think: Do I actually believe this? Why?
The data is clear: when the childhood experience of faith is shallow, scripted, or negative, the faith doesn't stick. But when it's real—when questions are welcomed, when formation runs deep—people stay.
A complete Sunday School curriculum designed to form thinkers, welcome hard questions, and build faith that lasts. 24 volumes. Every age group. Completely free.
Somewhere along the way, Sunday School became a conversion funnel instead of a formation process. We started treating kids as souls to be won rather than people to be formed. We told them that people who don't believe are outsiders. We created two categories: saved and lost, in and out, us and them.
And then we treated the children themselves as if they were already on one side of that line, as if their parents' faith automatically became their own.
But that's not how the early church worked.
The early church had catechists. Teachers who would walk with seekers for years before baptism. They didn't rush people to a decision. They engaged with questions. They let people sit in uncertainty. They trusted that formation takes time, and that faith built slowly on honest ground would outlast faith built quickly on shallow answers.
We replaced catechesis with curriculum. We replaced formation with information. We started teaching kids like they needed to be closed, like a sale, rather than accompanied, like a student.
And then we wonder why they leave when they finally have permission to ask questions.
What if Sunday School were actually school? Not entertainment. Not daycare. Not a holding room until the kids are old enough for "real" church. But a place where deep conversations happen, where real learning takes place, and where faith is explored with intellectual honesty and spiritual openness.
What if we taught kids like they were going to become teenagers who ask hard questions? What if we prepared teachers to engage with doubt instead of shutting it down?
That's what these volumes are for.
Deep Research Sunday School Lessons is a 24 volume curriculum built on a simple premise: the six year old in your class today will be a sixteen year old with hard questions tomorrow, and a twenty six year old making real decisions about faith the day after that. These lessons don't treat kids as conversions waiting to happen. They treat them as thinkers, as future adults, as people who deserve to be taken seriously now so they don't feel like strangers to the faith later.
Every lesson in every volume includes tools that most curricula skip entirely. Because we believe the teacher's preparation matters as much as the student's experience.
Real theological questions kids actually ask, with honest frameworks for discussion. Not scripted answers. Frameworks for thinking.
Guidance on what not to say. How not to accidentally shut down curiosity or give glib answers that fall apart later.
Grades 1 to 3. Grades 4 to 6. Grades 7 to 8 and Adult. The same Scripture, deepening over time. Kids can revisit passages as they mature and find new layers.
Historical context. Cultural background. The Big Idea. Theological Core. These lessons are researched, not recycled.
Every lesson is built around facilitated discussion. Questions to ask. Probes to go deeper. Space for "I don't know."
Activities, challenges, and connection to real life. Faith that matters on Monday, not just Sunday.
These lessons draw primarily from the 66 books of the Protestant canon using the NIV translation. Occasionally, lessons reference the Deuterocanonical books, texts honored as Scripture by Catholic, Orthodox, Anglican, and Ethiopian Christian traditions. We include these sparingly but intentionally, because we believe Christians should be inclusive of other Christians. The body of Christ is large, and our differences should draw us closer together in mutual respect, not push us apart in division.
We built these volumes because we believe the next generation deserves better. Better than shallow. Better than scripted. Better than curriculum that treats doubt like a disease instead of a doorway. This isn't a lead magnet or a loss leader. It's a gift. Take it. Use it. Share it. Put the school back in Sundays.
Discover the freedom that comes through biblical forgiveness. This volume explores the transformative power of releasing bitterness and embracing God's grace to move forward in healing and hope.
christian-living
Continue your journey toward emotional and spiritual freedom. Learn practical steps to let go of past hurts and experience the peace that comes from walking in forgiveness.
christian-living
Deepen your understanding of God's forgiveness and how it empowers us to forgive others. This volume provides biblical wisdom for breaking free from the chains of unforgiveness.
christian-living
Complete this powerful series with insights on maintaining a forgiving heart. Learn how to live in the freedom Christ offers when we truly let go and trust Him with our pain.
christian-living
Discover Christ-like love even in challenging relationships. This volume offers biblical strategies for extending grace, setting boundaries, and loving those who are hard to love.
christian-living
Navigate difficult relationships with wisdom and compassion. Learn how to maintain your peace while showing God's love to challenging personalities in your life.
christian-living
Grow in your capacity to love unconditionally. This volume provides practical tools for responding with grace when others test your patience and faith.
christian-living
Master the art of loving difficult people through God's strength. Conclude this series with powerful insights on reflecting Christ's love in your most challenging relationships.
christian-living
Explore the beauty and challenges of Christian community. This volume examines how believers can live together in unity, supporting and encouraging one another in faith.
christian-living
Deepen your understanding of biblical community. Learn practical ways to build authentic relationships and create environments where everyone can thrive spiritually.
christian-living
Discover the power of belonging to God's family. This volume addresses the joys and difficulties of doing life together as the body of Christ.
christian-living
Complete your journey into Christian community with insights on maintaining healthy, Christ-centered relationships that glorify God and build His kingdom.
christian-living
Explore God's heart for justice and mercy. This volume examines how Christians are called to pursue righteousness while extending compassion to those in need.
devotional
Learn to balance truth and grace in a broken world. Discover biblical principles for standing up for what is right while showing Christ's love to all people.
devotional
Deepen your commitment to living justly and loving mercy. This volume provides practical guidance for making a difference in your community through faith-driven action.
devotional
Conclude this transformative series with a call to embody God's justice and compassion. Learn how to be His hands and feet in a world desperate for hope and healing.
devotional
Gain biblical tools for managing anger and resolving conflict. This volume offers practical strategies for responding to difficult situations with wisdom and self-control.
christian-living
Learn to transform anger into constructive action. Discover how to address conflict in ways that honor God and preserve relationships.
christian-living
Master the art of peaceful conflict resolution. This volume provides biblical wisdom for navigating disagreements and maintaining unity in the midst of tension.
christian-living
Complete your journey toward emotional maturity and peaceful living. Learn lasting strategies for managing anger and resolving conflicts in Christ-like ways.
christian-living
Build a foundation of godly character and unwavering integrity. This volume explores the biblical principles that shape a life of honor and faithfulness.
leadership
Strengthen your commitment to living with integrity. Learn how to make choices that align with God's values in every area of your life.
leadership
Develop the character traits that please God and impact others. This volume provides practical guidance for growing in holiness and authentic Christian living.
leadership
Conclude this powerful series with a call to lifelong character development. Discover how integrity in all things brings glory to God and transforms your witness to the world.
leadership