DC:0–5™ (Diagnostic Classification of Mental Health and Developmental Disorders of Infancy and Early Childhood) Version 2.0 is the definitive diagnostic manual for professionals working with children from birth through age 5. Used worldwide by clinicians and early childhood specialists, it offers a developmentally grounded approach to identifying and treating mental health and developmental disorders in the earliest years, when intervention matters most.

First introduced in 1994 and widely trusted across disciplines, Version 2.0 sharpens clinical precision through a comprehensive five-axis system that integrates developmental context, relationships, and psychosocial stressors. It equips professionals to diagnose conditions not fully addressed in other systems, apply criteria with confidence, communicate clearly across teams, and align with standardized diagnostic codes. The result is earlier identification, stronger care planning, and better outcomes for children and families.

Fully updated to reflect current research and clinical practice, Version 2.0 includes refined guidance for children up to age 5, expanded considerations for younger ages, and updated diagnostic algorithms for emerging and evolving disorders.

DC:0–5™ (Diagnostic Classification of Mental Health and Developmental Disorders of Infancy and Early Childhood) Version 2.0 is the definitive diagnostic manual for professionals working with children from birth through age 5. Used worldwide by clinicians and early childhood specialists, it offers a developmentally grounded approach to identifying and treating mental health and developmental disorders in the earliest years, when intervention matters most.

First introduced in 1994 and widely trusted across disciplines, Version 2.0 sharpens clinical precision through a comprehensive five-axis system that integrates developmental context, relationships, and psychosocial stressors. It equips professionals to diagnose conditions not fully addressed in other systems, apply criteria with confidence, communicate clearly across teams, and align with standardized diagnostic codes. The result is earlier identification, stronger care planning, and better outcomes for children and families.

Fully updated to reflect current research and clinical practice, Version 2.0 includes refined guidance for children up to age 5, expanded considerations for younger ages, and updated diagnostic algorithms for emerging and evolving disorders.

Introducing our exclusive LEARN Conference 2026 Virtual Experience: an unparalleled opportunity for early childhood professionals to engage with cutting-edge content and connect with peers from across the country—all from the comfort of your own space.

This course gives you access four content-rich main stage sessions broadcast live to your device, ensuring you're at the forefront of field innovations – and inspirations. 

Revisit every session with on-demand access for 30 days post-event. Learn at your pace, on your schedule, without worrying about missing out.

Earn up to four contact hours (.4 CEUs) with completion of CEU quizzes and Evaluations for each session.

DC:0–5™ (Diagnostic Classification of Mental Health and Developmental Disorders of Infancy and Early Childhood) Version 2.0 is the definitive diagnostic manual for professionals working with children from birth through age 5. Used worldwide by clinicians and early childhood specialists, it offers a developmentally grounded approach to identifying and treating mental health and developmental disorders in the earliest years, when intervention matters most.

First introduced in 1994 and widely trusted across disciplines, Version 2.0 sharpens clinical precision through a comprehensive five-axis system that integrates developmental context, relationships, and psychosocial stressors. It equips professionals to diagnose conditions not fully addressed in other systems, apply criteria with confidence, communicate clearly across teams, and align with standardized diagnostic codes. The result is earlier identification, stronger care planning, and better outcomes for children and families.

Fully updated to reflect current research and clinical practice, Version 2.0 includes refined guidance for children up to age 5, expanded considerations for younger ages, and updated diagnostic algorithms for emerging and evolving disorders.

In this four-part webinar series, you’ll uncover essential strategies and meaningful next steps to creating quality interactions with infants and toddlers so that you can become the brain builder you were born to be.

Missed a session? Recordings for the Webinar Series are typically available 24-48 hours after each session. Full viewing of the recordings is required to earn CEUs. Access to the course and recordings closes 30 days after the last live session. 

These wheels tackle challenging behaviors and offer a 3-step approach to help you understand and manage behaviors such as biting, tantrums, inconsolable crying, separation and social withdrawal.

Deepen your understanding of the DC:0–5™ Diagnostic Classification of Mental Health and Developmental Disorders of Infancy and Early Childhood with a comprehensive review of the indispensable guide, straight from the source. 

The DC:0-5 Diagnostic Classification Manual is required for the training. You can find the Manual in the "Recommended Products" below. If purchasing the Print Edition during checkout please allow 1 - 2 weeks to receive your manual if you select standard shipping. 

RIOS™ Guide for Reflective Supervision and Consultation is a must-have resource for leaders strengthening reflective supervision and consultation in infant and early childhood settings. Grounded in the Reflective Interaction Observation Scale (RIOS), it provides a clear, research-informed framework to deepen supervisory practice and strengthen professional relationships. The included Reflection Self-Check tool supports ongoing growth, helping programs build stronger teams and improve outcomes for young children and families.

This is a great resource to help children process difficult experiences and build a sense of safety and belonging. It follows a puppy and a child who have both faced tough times and, with the support of family, learn to understand their fears, feel lovable and find a place to call home.

The Growing Brain Participant Manual is a digital workbook designed to deepen your learning throughout the ZERO TO THREE Growing Brain curriculum. Organized into seven interactive units, it highlights key concepts, reflection prompts, and space for personal notes across topics including brain basics, factors that shape development, communication and language, cognition and executive function, social-emotional growth, understanding behavior, and everyday play. Use it during training and beyond to reinforce practical strategies that support healthy brain development in infants and toddlers.

Biting is one of the most common and most upsetting toddler behaviors. Understand how to respond to the child who bit and the child who was bitten. Importantly, learn how to prevent biting in the future.