What Makes Day And Night By Franklyn Branley

Using Franklyn Branley's Book in a Classroom Setting

I picked up a copy of Franklyn Branley's book years ago when I was subbing for a third-grade science class and the regular teacher had left a unit on Earth's movements as part of her substitute folder. The plan was vague, but the book was there, and honestly, it did the heavy lifting for me. It's a straightforward nonfiction title that walks kids through why the Earth experiences day and night, and it pairs well with a simple flashlight demonstration that any teacher can set up in ten minutes. The book itself is nothing fancy. It's part of that older Science Picturebook line that came out decades ago, so the language sits around a third-to-fourth-grade reading level, and the illustrations are functional rather than dazzling. Kids who are already into science stuff tend to breeze through it. The ones who struggle with reading will need someone to read it aloud, which is where most teachers end up spending their time anyway.

What Makes Day And Night By Franklyn Branley

The core concept the book explains is rotation — the Earth spinning on its tilted axis once every twenty-four hours, which causes different parts of the planet to face toward or away from the Sun at different times. That's it. The book doesn't go into orbit mechanics or elliptical paths or any of the stuff that gets tacked on later in middle school. It sticks to the basic rotation model, and for the grade level it targets, that's exactly right. More detail at that stage just confuses kids who haven't internalized the foundation yet. When I used this book with my own kids years ago, I ran into a problem that probably comes up for other parents and teachers too. A lot of kids come away thinking the day-night cycle happens because the Earth moves closer to and farther from the Sun, like seasons do. The book does a decent job of separating those two ideas, but the illustration style doesn't always make the distinction crystal clear on the first read-through. I noticed my son kept saying the night side was just "in shadow because it's farther away" and I had to pull out a globe and a lamp and walk through it physically before he got it. Here's the workaround I ended up using that actually stuck. I grabbed a beach ball, drew a stick figure on it with a sharpie, and held it under the overhead light in my living room. I had him stand still and spin the ball while I asked questions about where the sun figure was facing. Then I switched roles — he spun while I pointed out which areas were lit and which weren't. That physical act of turning the sphere made it click in a way the book's diagrams never could. The book sets up the idea; the demonstration locks it in.

One thing the book handles better than most at this level is the explicit mention of the Earth's tilted axis. A lot of simplified science books for young readers skip the tilt entirely, which leads to follow-on confusion when kids later encounter seasons. Branley names it briefly and ties it to the rotation concept without getting bogged down, which I think is a smart editorial choice. You're not trying to teach both phenomena at once. The illustrations are serviceable but dated. They're cross-sectional diagrams and simple globes, nothing immersive. Some of the newer picture books on the same topic have full-spread artwork that pulls kids in faster. If you're working with a group that has shorter attention spans, you'll want to pair this with a video or interactive simulation to keep them engaged. That's not a flaw in the book — it's just a reality of teaching eight-year-olds anything anymore. Availability is a minor issue. The book is out of print in many of its earlier editions, so new copies can run forty or fifty dollars on Amazon if you're not careful. You can often find them used on AbeBooks or ThriftBooks for five or six bucks, sometimes with minimal highlighting. The newer editions from HarperCollins are still in print, but they've been revised over the years and some of the language has shifted slightly. The science hasn't changed, but if you're cross-referencing with a specific curriculum, check the edition date before ordering.

The biggest limitation of relying on this book alone is that it doesn't give teachers or parents ready-made activities or discussion questions built in. It's purely informational text. You have to supply the hands-on portion yourself, which is fine if you've taught this before but can feel like extra work if you're pulling it together last minute. I keep a standard supply of cheap globes and a couple of clamp-on desk lamps in my closet specifically for this kind of lesson so I don't have to scramble. For homeschooled families, the book works as a solid anchor text for a one-week unit. Pair it with a free online simulation like the one from NASA's Eyes on the Earth or the UC Museum of Paleontology's rotating globe tool, and you've got a complete lesson without buying a full curriculum package. The book gives the explanation. The simulation lets kids manipulate variables and see what happens when they change the tilt or the speed of rotation. That combination usually holds attention for the full twenty-minute window you're working with at that age. I should note that some educators have pushed back on this book over the years, mostly around the simplicity of the diagrams and the fact that it doesn't address common misconceptions head-on. That's fair. No book at this level does. But it's honest about what it's doing, and it doesn't introduce inaccuracies to fill space, which is more than you can say for a lot of the cheaper science readers on the market right now.