So you’ve heard about Ms. Stewart. Maybe you’re a new teacher staring down a triple-prep schedule and wondering how you’ll survive. Maybe you’re a parent curious why your kid’s science teacher seems to be in three places at once. Or maybe you’re just nosy, and that’s okay—we’ve all been there.
People argue about this. Here's where I land on it.
Here’s the thing about Ms. Stewart: she doesn’t just teach three science classes. She teaches biology, chemistry, and physics—all in the same day, sometimes back-to-back, in three different rooms. And it’s not a scheduling error. Day to day, it’s her reality. And if you’ve ever tried to switch mental gears from cell mitosis to balancing chemical equations to Newton’s laws in under 50 minutes, you know it’s not for the faint of heart.
But here’s what’s interesting: she’s good at it. So how does she do it? Now, really good. And what can the rest of us learn from a teacher who’s basically running a one-woman science department?
What Is Ms. Stewart Teaches Three Science Classes
Let’s be clear: this isn’t about one heroic teacher doing the work of three. Ms. Day to day, it’s about a structural reality in many schools—especially smaller ones—where staffing, enrollment, and master schedules force teachers to cover multiple, distinct science disciplines. Stewart might be the only certified science teacher in her building for grades 9–12, or her school might not have the budget for a dedicated physics or advanced chemistry instructor The details matter here..
So she teaches three separate science classes, each with its own curriculum, labs, assessments, and required standards. These aren’t just different periods—they’re different worlds Small thing, real impact..
The Subjects: Biology, Chemistry, Physics
Each of these subjects demands a different mindset:
- Biology is narrative and descriptive. It’s about systems, cycles, and life processes. Labs involve microscopes, dissections, and growing things.
- Chemistry is symbolic and quantitative. It’s equations, the periodic table, and precise measurements. Labs smell like chemicals and require strict safety protocols.
- Physics is conceptual and mathematical. It’s forces, motion, and energy. Labs involve ramps, carts, and data collection.
To go from “Okay, today we’re looking at onion root tip cells under the microscope” to “Put on your goggles—we’re burning magnesium” to “Let’s calculate the velocity of that marble” in the span of a few hours is a genuine cognitive load Not complicated — just consistent. No workaround needed..
The Logistics of Three Classrooms
Often, she’s not even in the same physical space. Worth adding: she might teach biology in a lab room with sinks and gas jets, chemistry in a smaller prep room, and physics in a general classroom where she has to bring in all the equipment herself. Her teacher bag is legendary—it carries lesson plans, lab supplies, a laptop, a projector remote, and probably a change of shoes.
Why It Matters / Why People Care
This isn’t just a quirky story about one teacher. It highlights a real tension in education: specialization versus generalization Not complicated — just consistent. No workaround needed..
When a teacher covers multiple sciences, students can still get a solid education, but there are trade-offs. Depth can sometimes be sacrificed for breadth. A teacher might be a biology wizard but only feel “okay” teaching physics. The school saves money, but the teacher burns more energy.
For students, it matters because consistency and expertise are valuable. A teacher who lives and breathes physics for an entire semester can build a richer, more nuanced understanding than someone who’s just visiting from the biology hallway Easy to understand, harder to ignore..
For other teachers, it matters because this scenario is a crash course in extreme time management, differentiation, and mental agility. Watching someone deal with it successfully is like taking a master class in teaching survival.
How It Works (or How to Do It)
So how does Ms. Stewart not lose her mind? It’s not magic. It’s a system. A messy, color-coded, caffeine-fueled system.
The Weekly Blueprint: Planning for Three Worlds
Her planning period isn’t just “prep time.” It’s triage Small thing, real impact..
She doesn’t plan “science” for the week. Her lesson plan book is divided into three columns, or she uses a digital system with three different color tags. She plans Biology Monday, Chemistry Tuesday, Physics Wednesday—and then loops back. Each subject has its own folder—physical or digital—containing that unit’s labs, quizzes, and videos.
A typical week might look like this:
- Monday: Biology block – focus on cell transport. Lab: egg osmosis demonstration.
- Tuesday: Chemistry block – focus on stoichiometry. Lab: baking soda and vinegar reaction to calculate yield.
- Wednesday: Physics block – focus on projectile motion. Lab: using a marble ramp and stopwatch.
- Thursday: Repeat biology, but move to the next topic. Chemistry repeats with a different group. Physics repeats.
- Friday: All classes do a short assessment or wrap-up, often a quiz or a reflective exit ticket.
The Daily Grind: Switching Hats
The mental switch is the hardest part. She has a ritual Small thing, real impact..
Between classes, she has maybe 5–7 minutes. In that time, she:
- Takes a deep breath. Think about it: 2. Worth adding: erases the board from the last class (or switches the slide deck). Still, 3. Sets out the equipment for the next class—a tray with goggles, a beaker, a worksheet. Plus, 4. Says a quick, silent mantra: “Okay, physics now. Even so, forces. Free-body diagrams.
She uses student helpers—a “lab captain” from each class who helps set up and break down. This saves precious minutes and gives students ownership.
Classroom Management Across Three Cultures
Each class develops its own personality. Her biology class might be chatty and curious, her chemistry class meticulous and quiet, her physics class rowdy and hands-on Easy to understand, harder to ignore..
She adapts her management style:
- Biology: Uses think-pair-share, encourages storytelling about real-life examples (like “Why do your fingers prune in the bathtub?”).
- Chemistry: Enforces strict lab safety routines from day one. Day to day, uses a “no touching equipment until instructed” rule. * Physics: Embraces the noise. The class is often loud with groups testing hypotheses, so she uses a chime or a hand signal to regain attention.
Common Mistakes / What Most People Get Wrong
Watching from the outside, it’s easy to assume the biggest challenge is knowledge. “She must be a genius to know all that science!”
Nope. The knowledge is a given—she’s certified. The real pitfalls are different It's one of those things that adds up..
Mistake #1: Assuming You Can Teach Them the Same Way
You can’t. A lab that works beautifully for biology—like observing pond water—will flop in chemistry if you’re trying to teach molar mass. That said, the pedagogy must shift with the content. Treating them all as “science” classes leads to disjointed lessons and confused students But it adds up..
Mistake #2: Neglecting Your Own Prep Balance
It’s tempting
to spend all your prep time on the subject you love most. Think about it: if she's honest with herself, biology is her comfort zone—she could lesson plan that in her sleep. But her chemistry units need more attention because that's where students struggle most. She schedules "prep equity": equal time allocated to planning each subject, not just the one she enjoys teaching And it works..
Mistake #3: Underestimating the Grading Load
Three subjects mean three sets of assessments, three different rubric styles, and three piles of lab reports. Because of that, many new multi-subject teachers burn out by December because they treat grading as an afterthought. She learned to grade in batches—chemistry quizzes on Tuesday evening, biology lab reports on Thursday—to prevent the weekend avalanche Less friction, more output..
Easier said than done, but still worth knowing.
Mistake #4: Forgetting to Connect the Dots
Students rarely see the connections between disciplines on their own. She deliberately points these out: "Remember how we talked about catalysts in chemistry? Well, in your body, enzymes are biological catalysts doing the same job.If biology mentions enzymes and chemistry mentions reaction rates, that's not a coincidence—it's the same concept. " This interdisciplinary weaving transforms isolated facts into a cohesive understanding That's the whole idea..
Practical Tips for Surviving (and Thriving)
After years of refining her system, she's developed strategies that keep her sane:
1. Create a shared resource library. Lab equipment, worksheets, and digital slides are organized by subject and stored in clearly labeled folders—both physical and cloud-based. Nothing gets lost, and she can pull materials for any class in seconds But it adds up..
2. Use backward design for each unit. Start with what students must be able to do by the end, then build lessons that get them there. This prevents the "spiral of doom" where you realize too late that you haven't covered essential material.
3. Build a support network. She collaborates with other science teachers—even at other schools—via online forums. Venting about stoichiometry struggles with someone who truly understands is therapeutic and practical Still holds up..
4. Embrace imperfection. Not every lesson will be gold. Some days, biology drags, and physics feels rushed. She gives herself permission to tweak tomorrow rather than obsess over today's shortcomings.
5. Celebrate the variety. On tough days, she reminds herself: "I get to do egg osmosis and projectile motion in the same week." That variety isn't just a challenge—it's the privilege of watching students discover the world through three different lenses Took long enough..
Conclusion
Teaching biology, chemistry, and physics in one day isn't just a job—it's a marathon of the mind. Also, it requires flexibility, meticulous organization, and a willingness to constantly reinvent yourself. But for those who embrace it, the rewards are unique. You become the thread that connects disciplines for students, showing them that science isn't a collection of isolated facts but a single, interwoven way of understanding the universe.
She doesn't teach three subjects. Here's the thing — she teaches one subject—science—in three powerful, distinct ways. And every day, she watches students fall a little more in love with the process of figuring things out.
That's not just a career. It's a calling.
