Planet, People, Purpose: Sustaining the Practice of Teaching
By Dave Tupper
As we reflect on Planet, People, Purpose, I find myself thinking less about curriculum maps and more about people; specifically, the preservice and early-career teachers stepping into their own classrooms for the first time. As many preservice folks wind down their credential program this spring and hiring starts to ramp up, they need us more rather than less.
In my work with preservice science teachers, I see extraordinary commitment. They are entering the profession fluent in three-dimensional learning, they are eager to design lessons around phenomena, to invite students to ask questions, to analyze and interpret data, to construct explanations and design solutions. They believe in student-centered science.
And then reality hits.
Time pressures. Classroom management. Pacing guides. Attendance. Meetings. Induction. With these things may come the temptation to simplify instruction in the name of efficiency; it may become easy to slip from inquiry back to telling, from student discourse back to teacher explanation. Not because they lack skill or conviction, but because the ecosystem around them might feel overwhelming.
This is where practicing and veteran teachers matter.
If we look at our professional community through the lens of the Science and Engineering Practices, our role becomes clearer. We help new teachers continue asking questions about their instruction: What did students notice? Where did the discussion stall? What evidence do we have that learning occurred? We model how to analyze and interpret all kinds of data, not just assessment scores, but patterns in student thinking and engagement. We collaborate to construct explanations and design solutions when a well planned lesson doesn’t go the way we thought it would. Most importantly, we engage in professional argument from evidence; respectfully challenging one another to refine our practice rather than retreat to convenience. We can learn as much from our new colleagues as they can learn from us.
For preservice teachers, attending the California Science Education Conference can be transformative because it reveals that this kind of professional practice is not isolated. They see veteran educators openly sharing both successes and struggles. They see that this journey of continuous improvement is ongoing. They begin to understand that CASE is not just a conference or an organization, we are a support system for each other.
Similar to natural ecosystems relying on diverse, interconnected relationships to remain resilient, our profession depends on sustained mentorship, collaboration, and shared purpose. If we want new teachers to maintain the momentum from their preparation programs and resist the quiet drift toward more convenient but less student-centered instruction, we must intentionally cultivate that ecosystem.
So this spring, I invite practicing science educators, classroom teachers, TOSAs, site and district leaders, higher education partners, etc. to reach out. Invite a preservice teacher to join CASE or simply attend a CASE event. Check in with a first or second-year colleague. Share resources. Co-plan a lesson. Open your classroom. Offer encouragement. Sometimes sustaining purpose begins with something simple: connection.
When we invest in relationships and people, we strengthen our collective purpose. And when our professional ecosystem thrives, so do our students and the people, planet, and purpose they are preparing to shape.


