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Unit of Inquiry in IB PYP: Explained for Parents

Table of Contents

In early childhood and primary education, the most powerful learning doesn’t start with a worksheet—it starts with a question. “Why do we have rules?” “How do plants survive?” “What makes a community work?” That curiosity is exactly why inquiry-based learning sits at the heart of the IB Primary Years Programme (PYP): it turns children’s natural wonder into deep understanding, skills, and meaningful action. At Dwight School Seoul, the PYP is designed to be dynamic, inquiry-led, and concept-driven—helping students grow academically and socially-emotionally while learning to think critically and creatively.  

Why inquiry-based learning is central to early education

The IB PYP describes learning as transdisciplinary, inquiry-based, student-centred, and rooted in “responsible action.” In other words, children learn between, across, and beyond subjects—so knowledge feels connected to life, not siloed into separate periods. Inquiry-based learning helps children:
  • Build confidence in asking and refining questions
  • Connect ideas across reading, math, science, arts, and more
  • Practice collaboration and communication
  • Develop habits like reflection, research, and problem-solving

How the PYP curriculum uses Units of Inquiry

In the PYP, learning is organised through a Programme of Inquiry—a year-long map of learning experiences. Schools plan multiple Units of Inquiry (UOIs) under broad themes that are globally relevant and age-appropriate. At Dwight School Seoul, the PYP for Grades 1–5 includes:
  • Grade 1: 5 Units of Inquiry
  • Grades 2–5: 6 Units of Inquiry All aligned to the PYP’s six transdisciplinary themes and integrating six subject areas (including math, science, social studies, language, arts, and physical/social/personal education).

What is a Unit of Inquiry in IB?

A Unit of Inquiry is a planned learning journey where students explore a “big idea” through questions, investigation, and reflection—then apply what they learned in real-world ways. One helpful way to picture it:  

Unit of Inquiry in the IB Primary Years Programme

In the PYP, UOIs aren’t “extra projects.” They are the learning engine that connects classroom experiences to the bigger world. Dwight’s PYP emphasises:
  • Inquiry and concept-based learning over rote memorisation
  • Transdisciplinary themes that connect subjects
  • Learner Profile growth (students becoming reflective, inquisitive, empathetic, and more)
And because Dwight School Seoul is an IB continuum school (PYP–MYP–DP), students build a consistent approach to learning as they progress through grades.  

Key elements of the IB PYP Unit of Inquiry

Here’s what typically makes up a strong unit—plus what you’ll likely see as a parent.
UOI element What it means What parents often notice
Central idea The big understanding students build Kids explaining “the big point” in their own words
Lines of inquiry Sub-questions that guide investigation Class questions posted, student-led discussions
Key concepts Big thinking lenses (cause, connection, perspective, etc.) Children making comparisons and “why” explanations
Approaches to Learning (ATL) Skills like research, communication, self-management More independence, stronger routines, better teamwork
Learner Profile Traits like inquirer, thinker, caring and reflective Students talking about how they learn, not just what they learn
Action Real steps students take based on learning Helping others, changing habits, community involvement
Assessment Checkpoints to show growth (often varied and authentic) Portfolios, reflections, projects, presentations
Meadowridge summarises the holistic intent well: Units of Inquiry are designed to teach the “whole child”—concepts, skills, attitudes, knowledge, and action.  

How Units of Inquiry support concept-based learning

Concept-based learning means students don’t just memorise facts—they learn transferable ideas. For example, a unit might explore systems through ecosystems, human communities, and even simple machines. Dwight highlights that learning is “driven by key concepts,” helping students transfer understanding from one topic to another—an essential skill for long-term academic success.  

Role of UOI in the PYP curriculum

Think of UOIs as the “connective tissue” of the PYP:
  • They build global understanding through shared themes (like “Sharing the Planet”).
  • They connect subjects naturally, so math and literacy become tools for investigating real questions.
  • They shape student agency, because learners aren’t just receiving information—they’re constructing meaning and reflecting on growth.
If you’d like to explore how this connects to Dwight’s approach, see their overview of the primary school curriculum and the broader ib international context.  

Conclusion

A Unit of Inquiry in the IB PYP is more than a topic—it’s a structured way for children to become curious thinkers who can connect learning to life. At schools like Dwight School Seoul, students explore multiple units each year through transdisciplinary themes, building skills, concepts, and the confidence to take meaningful action.  

FAQs

1) What is a Unit of Inquiry in the IB PYP? A Unit of Inquiry is a planned, concept-driven learning journey where students investigate big ideas through questions, research, reflection, and action.   2) How many Units of Inquiry are there in the PYP? It depends on the school. At Dwight School Seoul, Grade 1 explores 5 units and Grades 2–5 explore 6 units per year.   3) What are the six PYP transdisciplinary themes? Who We Are; Where We Are in Place and Time; How We Express Ourselves; How the World Works; How We Organize Ourselves; Sharing the Planet.   4) Do Units of Inquiry replace subjects like math and English? No—subjects are still taught, but they’re integrated into the unit so learning connects across disciplines.   5) How are students assessed in a Unit of Inquiry? Assessment is often varied and authentic (projects, reflections, discussions, portfolios) to show both understanding and skills.   6) Why do parents often hear about the “Learner Profile” in PYP? Because the PYP aims to develop the whole child—helping students become reflective, caring, and internationally minded, not only academically strong.