Patterns of Change in the Moon Activity: 8 Hands-On Stations for Teaching Moon Phases and the Lunar Cycle (TEKS 4.9B)

Chris Kesler · 8 min read

You walk outside one night and the moon is a fat bright circle in the sky. Two weeks later you walk outside at the same time and the moon is just a thin curve, almost nothing. Two weeks after that, it's a full circle again. Same moon. Same place. Why does the shape keep changing?

That's TEKS 4.9B. It asks 4th graders to observe, record, and explain how the appearance of the moon changes over time in a predictable pattern as it orbits Earth. The trick is the word "appearance." The moon isn't actually growing and shrinking. We're looking at the same half-lit ball from different angles as it travels around us, and what we can SEE changes even though the moon itself doesn't.

The Patterns of Change in the Moon Station Lab for TEKS 4.9B takes that idea hands-on. Kids hold a foam ball on a stick (the Moon) in front of a flashlight (the Sun) and rotate their body (Earth) through four positions to see the new moon, first quarter, full moon, and third quarter for themselves. They sort eight moon-phase photos into the correct lunar cycle order, organize three different starting points into the next two phases, and predict what the moon will look like one week after a new moon and one week after a full moon.

⏱ 1–2 class periods 📓 4th Grade Science 🧪 TEKS 4.9B 🎯 Built-in differentiation 💻 Print or Digital

8 hands-on stations for teaching patterns of change in the moon

A station lab is a student-led activity where small groups rotate through 8 stations (plus a 9th challenge station for early finishers) at their own pace during one to two class periods. You become a facilitator instead of a lecturer. You walk around, spot-check, and break misconceptions while the kids work through the rotation.

The Patterns of Change in the Moon Station Lab has four input stations (where students take in new information on the lunar cycle) and four output stations (where they show what they learned). Here's what's at each one.

📷 Image slot 1 — add screenshot

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4 input stations: how students learn the lunar cycle

🎬 Watch It! —

A short YouTube video introduces the moon's orbit around Earth and the lunar cycle. Three questions on the answer sheet check whether students caught the big ideas: which direction the moon revolves around Earth (clockwise or counterclockwise), which moon phase occurs when the lit side reflects back to Earth as a full circle (full moon), and which phase occurs when the moon is between Earth and the Sun and we can't see it at all (new moon). The video gets the vocabulary in their ears before they touch a foam ball or sort a single photo.

📖 Read It! —

A one-page passage called "The Ever-Changing Moon" walks through the lunar cycle in order. The moon orbits Earth in a set path and the orbit takes about one month. The moon doesn't make its own light, it reflects sunlight, and the Sun always lights up half of the moon. The four key phases get named in sequence: new moon (between Earth and Sun, looks dark), first quarter moon (one-fourth of the way around, half lit), full moon (halfway around, fully lit), and third quarter moon (three-fourths around, half lit on the other side). Three multiple-choice questions follow, plus the five vocabulary words: lunar phases, new moon, first quarter moon, full moon, third quarter moon. Comes in two reading levels (Dependent and Modified) plus a Spanish version.

🔬 Explore It! —

Thirteen task cards walk groups through a hands-on physical model. Each group gets a flashlight (the Sun) and a foam ball stuck on a stick (the Moon). Each student becomes Earth. Students hold the moon directly in front of them and face the flashlight, then rotate their body through four positions: facing the Sun (new moon, all shadow), Sun on the right side (first quarter, right half lit), Sun on the back with the moon held higher to avoid blocking the light (full moon, fully lit), and Sun on the left side (third quarter, left half lit). They record what they see at each position. The model is the part kids will remember because it explains the WHY behind every photo they see in Research It! and Organize It!.

💻 Research It! —

Twelve reference cards include a labeled diagram of all eight moon phases (new moon, waxing crescent, first quarter, waxing gibbous, full moon, waning gibbous, last quarter, waning crescent) plus eight individual photo cards labeled A through H showing the actual moon at each phase. Students study the diagram and then sort cards A through H into the correct order, paying close attention to which side of the moon appears lit. They answer how many phases there are total (8), and explain the pattern they notice as the moon's appearance changes over time. This is the station that ties the hands-on Explore It! model to real lunar photography.

📷 Featured station deep-dive — add screenshot of the Explore It! task card

4 output stations: how students show what they learned

📋 Organize It! —

A pattern-extension card sort with three starting points (circle, square, triangle). Each starting point shows the first phase of the moon for that pattern, and groups have to determine the NEXT two phases in correct order. This forces kids to use the cycle pattern instead of just memorizing one fixed sequence. Pattern 1 starts with a waning gibbous (a circle marker), and the next two phases should follow the cycle. Pattern 2 starts with a full moon (triangle), Pattern 3 starts with a third-quarter-ish view (square). Three different starting points, three correct sequences. If a group can extend all three patterns, they really understand the cycle, not just the order on a single chart.

🎨 Illustrate It! —

Students sketch the next THREE phases of the moon after the first quarter moon, with each phase labeled. The correct answer is waxing gibbous, full moon, waning gibbous (though many 4th graders just write the four major phases: first quarter, full moon, third quarter, new moon). The labeling step is what catches the kids who only halfway understand. They can draw the shapes but they freeze when they have to name them. That's where the teacher walks over and points back at the Research It! cards to push them.

✍️ Write It! —

Three open-ended questions in complete sentences. First, explain how the appearance of the moon follows a predictable pattern. Second, about one week after the new moon phase, what do you predict the moon will look like and what is the name of this phase (a first quarter moon, half lit on the right). Third, about one week after the full moon phase, what do you predict the moon will look like and what is the name of this phase (a third quarter moon, half lit on the left). The two prediction questions are the heart of this station. Kids who get the cycle can predict either direction. Kids who only memorized one chart get stuck.

📝 Assess It! —

Three multiple-choice questions plus a fill-in-the-paragraph that uses the five Read It! vocabulary words (lunar phases, new moon, first quarter moon, full moon, third quarter moon). The multiple choice covers how much of the lit side we see during the new moon (none), what happens to the moon's appearance after a full moon (it decreases), and during which phases we see only half the moon lit (first and third quarter). The fill-in paragraph traces the lunar cycle from full moon to third quarter to new moon to first quarter using the actual vocabulary. If you're grading this lab, this is the easiest station to grade.

Bonus Challenge It! station for early finishers

🏆 Challenge It! —

Four optional extensions: write a one-paragraph journal entry describing the pattern of moon changes over a month with the phase names included; create a flipbook with at least four different pages showing the phases of the moon (index cards, cut-up paper, or digital); design and create a model of at least two phases with a key identifying which phase you chose; or create a missing poster for the moon with the phase when the moon went "missing" drawn and labeled (plus the other phases). Requires teacher approval before they start.

How this fits into a complete Patterns of Change in the Moon unit

This Station Lab is the Explore day of our full Patterns of Change in the Moon Complete 5E Lesson for TEKS 4.9B. The complete two-week unit follows the 5E method of instruction and includes an Engage hook, the Patterns of Change in the Moon Station Lab for Explore, PowerPoint slides and interactive notebook pages for Explain, student choice projects to Elaborate, and an Evaluate assessment.

Most 4th-grade teachers I work with grab the full 5E because the Station Lab lands hardest when the days around it support it. But if you just need a strong hands-on day on the lunar cycle, the Station Lab on its own does the job.

Two options

Patterns of Change in the Moon 5E Lesson cover

Full 5E Lesson $13.20 Get the 5E Lesson

Patterns of Change in the Moon Station Lab cover

Just the Station Lab $7.20 Get the Station Lab

Materials needed to teach patterns of change in the moon

Materials beyond what's in the download:

One flashlight per group for the Explore It! station. A regular handheld flashlight works perfectly. Test the batteries the night before. A dim or flickering flashlight ruins the model because the shadow on the foam moon needs to be sharp.
One foam ball on a stick per group. Styrofoam craft balls (about the size of a baseball or a little bigger) work great. Push a wooden skewer, a pencil, or a chopstick into the ball. White or off-white foam shows the lit/shadow line most clearly. If you can't find foam balls, ping-pong balls glued onto a stick are a budget substitute.
Optional: black bulletin board paper or a darkened classroom. The Explore It! model works best when the room is fairly dark so the flashlight is the only major light source. Pull the shades or turn off overhead lights at this station.
Colored pencils or markers for the Illustrate It! station.
Pencils and the printed answer sheets (included)
A device with internet for the Watch It! station

If you're like most 4th-grade teachers, the Explore It! materials look like a craft-store run. A bag of 12 foam balls is about $10, a 50-pack of wooden skewers is $4, and a 10-pack of flashlights is around $20. Everything reuses year after year. The foam balls especially. Tuck the kit in a bin after the unit ends.

Standard covered: Texas TEKS 4.9B —

Observe, record, and explain that the appearance of the moon changes over time in a predictable pattern as it orbits Earth.

See the full standard breakdown →

Grade level: 4th grade space science

Time: One to two class periods (45–110 minutes total). Plan for two periods the first time you run this lab. The Explore It! foam-ball model takes more time than a typical input station because each student in the group does the rotation themselves.

Common student misconceptions this lab fixes

"The moon actually grows and shrinks each month. It's a different size in the sky depending on the phase."
This is the single biggest 4th-grade misconception on this standard. Kids see a thin crescent and a fat full moon and conclude the moon itself is changing size. The Read It! passage names the real cause directly: the moon doesn't make its own light, it reflects sunlight, and the Sun always lights up half of the moon. The Explore It! foam-ball model is what really fixes this. Kids hold the SAME foam ball through all four positions. The ball never changes size. What changes is which part of the lit half they can see from Earth's perspective. The Research It! diagram showing all eight phases on the same orbit (with the moon always half-lit by the Sun) drives it home. By the time kids hit the Write It! prediction questions, they're describing different views of the same lit half, not a moon that's literally growing.
"The moon disappears completely during a new moon. It goes away and comes back."
4th graders see a sky with no moon and conclude the moon is gone. The Read It! passage explains why this looks the way it does. During the new moon, the moon is between Earth and the Sun. The lit side is facing the Sun, so from our perspective on Earth, the only side we can see is the dark side. The Explore It! Card 4 demonstrates it directly. Hold the foam moon between you and the flashlight, and the side facing you is in shadow. The moon hasn't disappeared. We just can't see the lit half. The Organize It! pattern sort puts new moon in its proper place in the cycle, between waning crescent and waxing crescent. Always there, always part of the pattern.
"Earth's shadow is what causes the moon phases. The Earth is blocking the Sun from hitting parts of the moon."
This one is sneakier than the others because it sounds like real science (Earth IS in the system, after all). But it's wrong. Earth's shadow causing a phase would be a lunar eclipse, which is rare. Regular moon phases happen because we're looking at the half-lit moon from different angles as it orbits us. The Read It! passage clarifies it. The Sun always lights up half of the moon. What changes is the angle WE see. The Explore It! model proves it. When the moon is in the "full moon" position (behind the student, who represents Earth), the student literally has to hold the moon HIGHER to avoid blocking the flashlight with their own body. If Earth's shadow caused phases, that wouldn't be necessary. The whole orbit happens without Earth blocking the light most of the time.

What you get with this Patterns of Change in the Moon activity

📷 Inside-the-product — add screenshot of Read It passage or sample answer sheet

When you buy the Station Lab, you get a single download with everything you need:

Print version at two reading levels (Dependent for on-grade, Modified for additional support) plus a Spanish Read It! passage
Digital version as PowerPoint files (works in Google Slides too) at both levels — for 1:1 classrooms or Google Classroom
Teacher Directions and Answer Key for both versions, all keys included
Station task cards ready to print, laminate, and drop in baskets at each station
Reference cards for the Research It! station (12 cards including the labeled 8-phase moon diagram, eight photo cards A through H showing each phase, and three analysis questions)
Explore It! task cards with step-by-step instructions for using a flashlight and foam ball to model new moon, first quarter, full moon, and third quarter
Sort cards for the Organize It! station (three pattern starters with moon phase photos to extend the cycle)
Student answer sheets for each level

Tips for teaching moon phases in your 4th grade classroom

Two things make this lab go smoother the first time:

1. Build one Explore It! model yourself the night before.

The foam-ball model is the heart of this lab, and it ONLY works if the moon, the Earth (the student's head), and the Sun (the flashlight) are at the right heights. The most common problem is that students hold the moon too low, and their own body casts a shadow on the foam ball during the "full moon" step. Take five minutes the night before to build one model yourself. Stand in front of a flashlight propped on a table at eye height. Hold the foam ball at arm's length. Rotate through the four positions and note where your body wants to block the light. The full-moon step is the tricky one. You'll need to hold the ball UP higher than your head. Teach this to the kids before the rotation starts and the station runs smoothly.

2. Darken the Explore It! station as much as possible.

If you're like most 4th-grade teachers, your room has plenty of fluorescent overheads that wash out shadows. The foam-ball moon model needs CONTRAST between the lit half and the dark half to teach the lesson. Set up the Explore It! station in the corner away from the windows, drape a piece of black bulletin board paper over a desk to create a partial wall, or just turn off the overheads at that station only. The flashlight should be the dominant light source. Even partial dimming makes the shadow line on the foam ball way easier for kids to see and describe on their answer sheets.

Get this Patterns of Change in the Moon activity

Patterns of Change in the Moon Station Lab for 4th grade space science — TEKS 4.9B

Buy the Station Lab — $7.20

Or if you want the full two-week experience with the Engage hook, Explain day, Elaborate extension, and Evaluate assessment all included:

Buy the full 5E Complete Lesson — $13.20

(Station Lab is included)

Frequently asked questions

What does TEKS 4.9B cover?

Texas TEKS 4.9B asks 4th grade students to observe, record, and explain how the appearance of the moon changes over time in a predictable pattern as it orbits Earth. By the end of this lab, kids should be able to name the four main phases (new moon, first quarter, full moon, third quarter), put the eight phases of the lunar cycle in order, predict what the moon will look like one week later, and explain that the moon doesn't grow or shrink — we're just seeing different parts of the lit half as it orbits us.

Does this lab cover all 8 phases or just the 4 main ones?

Both. The Read It! passage and the vocabulary focus on the four main phases (new moon, first quarter, full moon, third quarter) because that's what the standard names. The Research It! station then shows all eight phases (new, waxing crescent, first quarter, waxing gibbous, full, waning gibbous, last quarter, waning crescent) on a labeled diagram and asks kids to sort eight photos in the correct order. So kids leave with the four core phases solid and exposure to the eight-phase cycle that extends them.

How long does this Patterns of Change in the Moon activity take?

One to two class periods (45 to 110 minutes total). The Explore It! foam-ball model takes more time than a typical input station because each student in the group rotates through the four positions themselves. Plan for two periods the first time. Once your class has the rotation routine down, most groups can finish all 8 stations in one period.

Do I need a dark room for the Explore It! station?

It helps a lot but isn't required. The flashlight (Sun) and foam ball (Moon) need to be the dominant light source so the shadow line on the moon is sharp. If your room is too bright, the lit and unlit halves of the moon ball both look gray. Set up that one station in a corner away from windows, drape a piece of dark bulletin board paper as a partial wall, or turn off the overheads at that station only.

Can I use this in a 1:1 digital classroom?

Yes. The full digital version (PowerPoint or Google Slides) works in 1:1 classrooms and Google Classroom. Students drag digital cards at the Organize It! pattern sort, look at the moon phase photos on their screens, and type their answers on the answer sheet. The Explore It! hands-on foam-ball model is harder to digitize. You can substitute a free interactive moon phase simulator (NASA has one called "Daily Moon Guide" and there's a popular one from the My NASA Data project) that lets students click through the orbit and see what the moon looks like at each position.