One Interesting Fact for the Day: How curiosity has changed the way my students learn about the human body

“‘Can we have the truth of today’s body before we start English?'”

That has been one of the most common questions in my PYP 3 class. What started as a five minute practice unexpectedly grew into a heartbeat How the World Works and it changed the way my students learned about the human body.

Like many teachers, I have previously introduced the principles of the body by explaining each principle, discussing its parts and asking students to complete activities that reinforce the concepts. While students remembered interesting facts, I noticed that they often struggled to explain how different systems work together or why they are important. More importantly, they were waiting for information instead of actively seeking it.

I wanted to change that balance. Rather than positioning myself as an expert on all the answers, I wanted my students to be investigators who ask questions, seek evidence and share their findings.

That decision led to one simple class plan: Amazing Human Body Fact of the Day.

Every morning began with an amazing fact displayed on the board.

“Your heart beats about 100,000 times every day.”

“You produce enough saliva in your lifetime to fill two swimming pools.”

Your bones are constantly building.

Before anyone reached for a book or device, students were encouraged to think. Was this statement believable? Why might it be true? Could they explain it using what they already knew?

These conversations rarely ended after five minutes. They spill over into conversations, lunchtime chats and even home conversations. Students began to come forward with facts they had discovered, often eager to challenge the class with their own questions. Curiosity had become part of our classroom culture.

Kath Murdoch (2015) describes the investigation as beginning with genuine surprise, and that is exactly what I saw happen. Everyday facts were no longer just interesting bits of information; they become invitations to investigate.

Once students develop this sense of curiosity, they work in groups to explore one body system in depth. Each group focused on a different system, including the digestive, respiratory, circulatory, skeletal or nervous systems. Using books, teacher-selected websites and classroom discussions, they gather information, compare ideas and decide how best to communicate their learning to others.

Instead of completing the same worksheets, each group made different choices. Others have built simple models. Others have designed labeled diagrams or visual representations. Their challenge was not just to gather facts but to teach their classmates in a way that makes learning meaningful.

As I moved around the classroom, my role gradually shifted from teacher to assistant. My questions changed again. Instead of explaining concepts, I found myself asking, “What evidence supports that theory?” or “How does your system depend on others?”

One afternoon, I saw a student asking a question about oxygen transport. Before I could answer, another kid said, “Let’s ask the blood test team—do some research on that.” It was a short exchange, but it showed something important. Students began to appreciate each other’s abilities rather than relying solely on the teacher.

This type of collaborative learning reflects Vygotsky’s (1978) belief that understanding develops through interaction with others. As students discuss, question and refine their thinking together, they create knowledge collaboratively rather than memorizing information in isolation.

The impact of the investigation began to show as the weeks progressed.

Students who had hesitated to contribute during discussions confidently explained how the body’s systems work together. Scientific vocabulary that sounded strange at first became part of the everyday language of the classroom. Instead of describing the body as a collection of separate organs, students talk about the systems that work together to make us live.

Learning extends beyond the classroom. Families share stories of children discussing physical activity over dinner or looking for more information at home. Several students proudly arrive each morning ready to share some interesting fact they discovered overnight. Their enthusiasm showed that learning had a personal purpose rather than something limited only to school hours.

Throughout the unit, I gathered evidence through observations, student reflections, research journals and presentations. Comparing students’ initial responses to their final explanations revealed a much deeper understanding of the concept. They no longer remembered isolated facts; they communicated, asked intelligent questions and explained ideas with great confidence.

Research suggests that students learn more deeply when they actively construct understanding and engage in meaningful discussion (Hattie, 2023). Looking back, I believe the most powerful aspect of this unit was not the activities themselves but the environment they created. Students feel safe to question, investigate, respectfully disagree and learn from each other.

This experience also reminded me that investigations do not always require elaborate resources or complex lesson plans. Sometimes, it starts with a single question or unexpected fact that encourages children to take a closer look at the world—and at themselves.

Months after the unit is over, students are still stopping me in the hallway to tell me something new they learned about the human body.

To me, that’s probably the biggest measure of success. The facts may eventually fade, but the curiosity that inspired them continues to grow.

References

Hattie, J. (2023). Visual learning: Next. Routledge.

International Baccalaureate. (2018). Learning and teaching. International Baccalaureate Organization.

Murdoch, K. (2015). The power of questioning. Seastar Education.

Vygotsky, LS (1978). Mind in society: The development of higher cognitive processes. Harvard University Press.