Practical guide to designing IB Primary Years Programme (PYP) assessment. Learn how to build central ideas, lines of inquiry, and 4-band success criteria that match IB's Beginning/Approaching/Meeting/Exceeding continuum. Includes AI-powered PYP assessment generator.
Picture a Grade 3 classroom mid-inquiry. Students have posed 47 questions about how bees make honey. The teacher needs to check what they understand right now, plan tomorrow's investigation, and later prove to parents at exhibition that these seven-year-olds have grown as inquirers. Three assessment moments. One central idea. Zero traditional tests.
That is PYP assessment in miniature, and it is why teachers moving into the Primary Years Programme from a more traditional grading culture often feel the ground shift. There are no letter grades in most PYP schools. There is no unit exam waiting at the end of week six. What there is, instead, is a continuous stream of evidence gathered through inquiry, anchored to a central idea, and reported against a four-band continuum that says where the child is on the journey from Beginning to Exceeding.
This guide walks through how PYP assessment actually works: what makes it structurally different from MYP and DP, how to write a central idea and lines of inquiry that generate real evidence, how the four-band success criteria continuum reads in practice, and where the exhibition sits inside the whole system. It also shows how the AssessmentWiz IB Assessment Generator handles all of this in about 30 seconds when you need a starting point.
The three IB programmes share a philosophy of inquiry and international-mindedness, but their assessment architectures are almost incompatible. MYP runs on four criterion strands (A, B, C, D) scored 0 to 8 with published descriptors. DP runs on subject-specific mark bands tied to external exams. PYP runs on none of that. PYP assessment is inquiry-embedded, transdisciplinary, formative-first, and reported against a Beginning / Approaching / Meeting / Exceeding continuum that describes growth toward a central idea.
The other structural difference is where the assessment target lives. In MYP you assess against criterion descriptors. In DP you assess against subject mark schemes. In PYP the target is the central idea and the lines of inquiry that unpack it, plus one to three Learner Profile attributes woven through the unit. Evidence gets read against the continuum with the central idea as the compass. That reframing is the biggest cognitive move for teachers new to the programme.
| Dimension | PYP (K-5) | MYP (6-10) | DP (11-12) |
|---|---|---|---|
| Structure | Six transdisciplinary themes, unit of inquiry | Eight subject groups, GRASP tasks | Six subject groups, exam papers + IA + EE |
| Assessment target | Central idea + lines of inquiry | Criteria A-D descriptors | Subject-specific mark bands |
| Scale | 4-band continuum (Beginning to Exceeding) | 0 to 8 per criterion | Component-specific bands (1 to 7 final grade) |
| Weight of formative | Dominant. Portfolios, conferences, journals. | Balanced with summative GRASP tasks | Formative supports, summative dominates |
| Culminating assessment | Grade 5 Exhibition (student-led inquiry) | Personal Project (Grade 10) | Extended Essay + externally-graded exams |
Most PYP schools do not issue letter grades before Grade 6. That does not mean assessment is soft. It means assessment is descriptive, evidence-driven, and used to inform the next teaching move rather than to sort students into a rank order. Parents get narrative reports at the end of each unit, keyed to the continuum.
Generate a PYP assessment for your unit — Pick your subject, transdisciplinary theme, and phase. AssessmentWiz drafts a central idea, lines of inquiry, and 4-band success criteria in about 30 seconds. Free to try, no signup.
A PYP assessment rests on three pillars: the central idea, the lines of inquiry, and the Learner Profile connection. Each pillar shapes what evidence you gather, what you ask students to produce, and how you read the continuum. Get any one of them wrong and the assessment either misses the transdisciplinary spine or drifts into a subject-specific test that could have been written for a non-PYP school.
The central idea is a single, timeless statement of what the unit is really about. It is not a topic, not a question, not a learning objective. It is one sentence a Grade 2 student and a Grade 5 student can both grasp, that pulls together the transdisciplinary theme, the subject content, and the concepts the unit will develop. The central idea is what students eventually paraphrase in their own words as the strongest signal of understanding.
Good central ideas share three properties. They are timeless (they hold true beyond this unit). They are transferable (they apply across contexts and cultures). They are conceptual (they name a relationship or principle, not a fact).
| Transdisciplinary theme | Subject anchor | Sample central idea |
|---|---|---|
| Sharing the planet | Grade 3 Science, ecosystems | Living things depend on each other and on their environment to survive and thrive. |
| How we express ourselves | Grade 2 Arts, visual storytelling | People use images, sounds, and words to communicate feelings and ideas across cultures. |
| Where we are in place and time | Grade 4 Social Studies, migration | The movement of people shapes places and changes the identities of communities over time. |
| How the world works | Grade 1 Science, forces and motion | Pushes and pulls change how objects move, and we can predict what will happen. |
| How we organize ourselves | Grade 5 Social Studies, systems | Communities create systems and rules to meet shared needs and solve shared problems. |
| Who we are | Kindergarten, identity and family | Families are made of people who care for each other in many different ways. |
A common trap is writing a central idea that sounds like a Grade 8 science standard. "Photosynthesis converts light energy into chemical energy in the chloroplasts of plant cells" is accurate, but it fails the transferable and grade-appropriate tests. The Grade 3 version might be, "Plants use sunlight to make the food they need to grow." Both are true. Only the second one is a PYP central idea.
Lines of inquiry are the two to four conceptual paths that unpack the central idea. They are not questions. They are noun phrases that name what students will investigate. Every line of inquiry generates a natural set of student questions, which then generate the tasks, evidence, and success criteria for the unit.
For the Grade 3 ecosystems central idea above, a typical set of lines of inquiry looks like this:
Notice that each line of inquiry is a doorway. Behind door one, students investigate a local food web. Behind door two, they compare two ecosystems in different climates. Behind door three, they interview a community member about a local environmental issue. Three lines of inquiry produce three natural assessment moments across the unit, each generating evidence that eventually reads against the central idea.
Every PYP unit weaves in one to three Learner Profile attributes as explicit assessment targets. The Learner Profile is the ten-attribute portrait of the IB learner: Inquirer, Knowledgeable, Thinker, Communicator, Principled, Open-minded, Caring, Risk-taker (also called Courageous), Balanced, and Reflective. In a PYP unit the teacher chooses which one to three attributes the unit will foreground, and then gathers evidence of those attributes alongside the content evidence.
For the ecosystems unit, a natural pairing is Inquirer (the whole point of the investigation), Caring (as students engage with human impact), and Reflective (in the end-of-unit synthesis). The success criteria for the unit will then include indicators for each: "I ask questions that help me investigate an ecosystem." "I show concern for how my choices affect other living things." "I reflect on what I learned about interdependence and what I still wonder about."
Choosing all ten attributes for every unit is a common trap. The point is deep integration, not checklist coverage. One to three attributes per unit, revisited across the year, produces stronger evidence than ten attributes lightly assessed in every unit.
PYP schools most commonly use a four-band continuum to describe where a student is in relation to the central idea and lines of inquiry: Beginning, Approaching, Meeting, and Exceeding. The bands are not a scale of correctness. They describe the depth and independence of the student's engagement with the concepts. A student at Meeting can explain the central idea in their own words and apply it to a new situation. A student at Exceeding does that plus makes connections the unit did not explicitly teach.
The contrast with the MYP 0 to 8 scale is instructive. MYP descriptors read as a nine-step ladder of achievement. PYP bands read as a four-step story of growth. Both are criterion-referenced, but PYP is much closer to a developmental progression than to a grading scale. That is why PYP report cards use narrative rather than numbers in most schools.
| Band | What the evidence shows for a Grade 3 ecosystems inquiry |
|---|---|
| Beginning | The student names some living things in an ecosystem and can identify basic needs (food, water, shelter). Connections between organisms are not yet described. The central idea is not yet in the student's vocabulary. |
| Approaching | The student identifies simple food chains and names some ways plants and animals depend on non-living factors like water and sunlight. Explanations are partial and may miss the mutual nature of interdependence. |
| Meeting | The student explains, in their own words, how living things depend on each other and on their environment. They can trace a food web, describe how removing one species affects others, and give at least one example of human impact. |
| Exceeding | The student extends the central idea to an ecosystem not studied in class, predicts second-order effects of environmental change, and proposes a specific action within their sphere of influence. They connect the inquiry to another transdisciplinary theme without prompting. |
Two design notes about descriptors. First, the descriptors should describe the student, not the task. "Names three organisms" is a task description. "Identifies living things in an ecosystem and can name their basic needs" is a student description. Second, the descriptors should escalate on depth of understanding and independence of application, not on quantity. A Meeting student who explains one clear food web in depth is above an Approaching student who lists five food webs shallowly.
PYP is formative-heavy by design. The programme assumes that the teacher will gather many small pieces of evidence across the unit, use each one to inform the next teaching move, and only step back at the end to synthesize what the collected evidence says about the student's growth on the continuum. That summative synthesis is not a final test. It is a professional judgment call, backed by portfolio evidence, that says where the student sits at the end of the unit.
Six evidence types cover almost every PYP unit. Each has a role and a moment when it is most useful.
The trap teachers coming from grade-heavy cultures often fall into is over-formative. Every conversation gets logged. Every worksheet gets a comment. The volume of evidence overwhelms the teacher, and the student receives so many small pieces of feedback that none of it sticks. A better rule is one substantial piece of evidence per line of inquiry, plus a mid-unit conference and an end-of-unit synthesis. That is five to six data points for a six-week unit, which is plenty.
Grade 5 exhibition is the culminating assessment of the entire Primary Years Programme. It is a six to eight week, student-led inquiry into an issue of local or global significance, mentored by a teacher but driven by the student or small group. Exhibition is where every muscle the programme has been building gets tested at once: inquiry, action, transdisciplinary thinking, all six approaches to learning, and every Learner Profile attribute the school has emphasized.
Exhibition is not a science fair. It is not a research project. It is not a rehearsed presentation. It is an authentic inquiry that begins with a student-generated question, moves through investigation and reflection, and ends with student-designed action. The teacher is a mentor, not a director. Parents and community members are audience and co-inquirers, not judges with rubrics.
Assessment during exhibition looks slightly different from a typical PYP unit. Success criteria are co-constructed with the student around their specific inquiry, not pre-written by the teacher. Evidence includes the process journal (equal weight to the final product), mentor conferences, peer feedback, and the culminating event itself. The four-band continuum still applies, but it is now read against the student's chosen inquiry rather than a teacher-designed central idea.
For schools building exhibition scaffolding, the AssessmentWiz PYP tool supports Phase 4 by generating exhibition frameworks, mentor conference guides, and process-journal prompts alongside the standard central-idea flow.
These are the errors that show up most often when teachers new to the programme design their first few units. Each one has a specific fix.
The AssessmentWiz IB Assessment Generator handles all three IB programmes in one tool. When you choose PYP, the form shape adapts: you pick the transdisciplinary theme, the phase (roughly K-1, 2-3, or 4-5), the subject anchor, and the Learner Profile attributes you want woven in. The generator then drafts a central idea, two to three lines of inquiry, a set of inquiry questions students might ask, a four-band success criteria continuum tuned to the central idea, and teacher notes on evidence collection across the unit.
The output is a starting point, not a finished plan. It is meant to give a PYP teacher a solid draft in about 30 seconds so the design conversation can begin from something concrete instead of from a blank template. Everything is editable, and the four-band descriptors are written to be student-facing so you can share them with your class after minor edits.
For Grade 5 exhibition, the tool includes a Phase 4 mode that generates exhibition frameworks: co-construction question sets for the initial student conference, mentor conference guides for each stage of the inquiry, and process-journal prompts. The four-band continuum is still generated, but with placeholders for the student's chosen inquiry focus so you can adapt it once the inquiry is underway.
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The tool supports all six 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) across the four PYP subject areas (language, mathematics, science, social studies) plus arts and personal, social, and physical education. You choose the theme, subject anchor, and phase, and the generator drafts a central idea and lines of inquiry that fit the transdisciplinary structure.
Yes. When you select Phase 4 with an exhibition focus, the generator switches to exhibition mode. It produces co-construction question sets for the initial student conference, mentor conference guides for each stage of the inquiry, process-journal prompts, and a four-band continuum with placeholders for the student's chosen inquiry focus. The output is designed to support student-led inquiry rather than replace it.
PYP is assessed against the central idea and lines of inquiry using a four-band continuum (Beginning, Approaching, Meeting, Exceeding), with most schools reporting narratively rather than using letter grades. MYP is assessed against four criterion strands (A through D) each on a 0 to 8 scale. DP is assessed against subject-specific mark bands tied to external exams. The AssessmentWiz IB tool auto-adapts its form and output to whichever programme you select.
Yes. When you generate a PYP assessment you can select one to three Learner Profile attributes from the ten (Inquirer, Knowledgeable, Thinker, Communicator, Principled, Open-minded, Caring, Risk-taker/Courageous, Balanced, Reflective). The generator will weave those attributes explicitly into the lines of inquiry, the success criteria descriptors, and the teacher notes rather than listing them as a check box.
Either. If you already have a central idea drafted, paste it in and the generator builds the lines of inquiry, success criteria, and evidence guidance around it. If you only have a topic and a transdisciplinary theme, the generator drafts a central idea for you, and you can edit or regenerate until it fits. Most PYP teachers report the draft-and-edit path saves 30 to 45 minutes compared with starting from a blank planner.
The tool is aligned to the Enhanced PYP framework (the version currently in use since 2018), including the four-band continuum, the emphasis on agency and student-led inquiry, and the integration of approaches to learning. Central ideas are conceptual and transferable rather than topic-based, lines of inquiry are noun phrases rather than teacher questions, and the Learner Profile is treated as an assessment target rather than a display item. The AssessmentWiz team follows updates to the IB PYP framework and adjusts the generator when substantial changes ship.