Thinking like a scientist
Students start the year learning how to ask testable questions, plan simple investigations, and record what they notice. Parents may see more curiosity at home and questions that start with how and why.
This is the year science becomes something students do, not just read about. Students ask their own questions, run small experiments, and use what they notice to explain how the world works. They look at forces and motion, how living things grow and depend on each other, and patterns in weather and the sky. By spring, students can plan a simple test, record what happened, and explain their thinking using the evidence they gathered.
Students start the year learning how to ask testable questions, plan simple investigations, and record what they notice. Parents may see more curiosity at home and questions that start with how and why.
Students push, pull, and roll objects to see how forces change motion. They explore heat, light, and sound as different forms of energy that move from one place to another.
Students look at how plants and animals are built to survive where they live, what they eat, and how traits pass from parents to offspring. Expect questions about pets, bugs, and backyard creatures.
Students track patterns in the sky, the seasons, and the weather, and look at how land, water, and air shape the places people live. They also study how people affect the planet.
Students take on small engineering challenges. They define a problem, sketch a plan, build a model, test it, and improve it. Look for cardboard, tape, and rough drafts of inventions coming home.
Students learn to tell the difference between a question science can test and a problem engineering can fix. They practice turning curiosity into something they can actually investigate or build a solution for.
Students build or draw a model (a diagram, a sketch, or a physical object) to show how something in nature works or how a design solves a problem. The model helps explain what they observe or predict what might happen.
Students plan simple tests and collect information to find out if an idea holds up. They decide what to observe, gather results, and use what they find to draw a conclusion.
Students look at collected data, like a chart of temperatures or a tally of observations, and describe what patterns they notice. This is how scientists figure out what the numbers are actually telling them.
Students use counting, measuring, and simple math to back up what they notice in science. Instead of just describing what happened, they use numbers to show it.
Students build a written explanation for something they observed, then back it up with evidence from their investigation. The explanation has to connect to what they actually found, not just what they guessed.
Students look at two possible answers to a science question, then use evidence from observations or data to explain which one holds up better.
Students read and discuss science information from books, videos, or experiments, then share what they found with others. They also check whether a source makes sense before using it.
| Standard | Definition | Code |
|---|---|---|
| Asking Questions and Defining Problems | Students learn to tell the difference between a question science can test and a problem engineering can fix. They practice turning curiosity into something they can actually investigate or build a solution for. | RI-SCI.SEP.3.1 |
| Developing and Using Models | Students build or draw a model (a diagram, a sketch, or a physical object) to show how something in nature works or how a design solves a problem. The model helps explain what they observe or predict what might happen. | RI-SCI.SEP.3.2 |
| Planning and Carrying Out Investigations | Students plan simple tests and collect information to find out if an idea holds up. They decide what to observe, gather results, and use what they find to draw a conclusion. | RI-SCI.SEP.3.3 |
| Analyzing and Interpreting Data | Students look at collected data, like a chart of temperatures or a tally of observations, and describe what patterns they notice. This is how scientists figure out what the numbers are actually telling them. | RI-SCI.SEP.3.4 |
| Mathematics and Computational Thinking | Students use counting, measuring, and simple math to back up what they notice in science. Instead of just describing what happened, they use numbers to show it. | RI-SCI.SEP.3.5 |
| Constructing Explanations | Students build a written explanation for something they observed, then back it up with evidence from their investigation. The explanation has to connect to what they actually found, not just what they guessed. | RI-SCI.SEP.3.6 |
| Engaging in Argument from Evidence | Students look at two possible answers to a science question, then use evidence from observations or data to explain which one holds up better. | RI-SCI.SEP.3.7 |
| Communicating Information | Students read and discuss science information from books, videos, or experiments, then share what they found with others. They also check whether a source makes sense before using it. | RI-SCI.SEP.3.8 |
Students sort and describe everyday materials by properties like color, hardness, and flexibility. They begin to notice how the tiny building blocks of matter determine what something looks, feels, and does.
Students test how pushes and pulls change the speed and direction of objects. They learn why some things stay still and others move, and what it takes to start, stop, or change a moving object.
Students explore how energy shows up in different forms, like heat, light, and sound, and learn that energy moves from one place to another but doesn't disappear.
Students explore how waves, like sound and light, carry energy and information from one place to another. They investigate real examples, such as how a phone call travels or how music moves through the air.
| Standard | Definition | Code |
|---|---|---|
| Matter and Interactions | Students sort and describe everyday materials by properties like color, hardness, and flexibility. They begin to notice how the tiny building blocks of matter determine what something looks, feels, and does. | RI-SCI.PS.3.1 |
| Motion and Stability | Students test how pushes and pulls change the speed and direction of objects. They learn why some things stay still and others move, and what it takes to start, stop, or change a moving object. | RI-SCI.PS.3.2 |
| Energy | Students explore how energy shows up in different forms, like heat, light, and sound, and learn that energy moves from one place to another but doesn't disappear. | RI-SCI.PS.3.3 |
| Waves and Information | Students explore how waves, like sound and light, carry energy and information from one place to another. They investigate real examples, such as how a phone call travels or how music moves through the air. | RI-SCI.PS.3.4 |
Students examine how living things are built and how they work, from the tiny cells inside them to the organs and systems those cells form.
Students trace how energy from the sun moves through a food chain and how matter (like water and nutrients) cycles back through living things. They also look at how plants, animals, and other organisms depend on and affect each other.
Students look at traits like eye color, fur patterns, or leaf shape and figure out which ones passed down from parents and which ones vary across generations.
Students look at how different living things share common traits and how they differ. They explore why some features help an animal or plant survive, and how those helpful traits get passed on over time.
| Standard | Definition | Code |
|---|---|---|
| Structures and Processes | Students examine how living things are built and how they work, from the tiny cells inside them to the organs and systems those cells form. | RI-SCI.LS.3.1 |
| Ecosystems | Students trace how energy from the sun moves through a food chain and how matter (like water and nutrients) cycles back through living things. They also look at how plants, animals, and other organisms depend on and affect each other. | RI-SCI.LS.3.2 |
| Heredity | Students look at traits like eye color, fur patterns, or leaf shape and figure out which ones passed down from parents and which ones vary across generations. | RI-SCI.LS.3.3 |
| Biological Evolution | Students look at how different living things share common traits and how they differ. They explore why some features help an animal or plant survive, and how those helpful traits get passed on over time. | RI-SCI.LS.3.4 |
Students explore where Earth sits in the solar system and how the Sun, Moon, and planets move in predictable patterns. They also look at clues in rocks and landscapes that reveal Earth's long history.
Students learn how Earth's major systems (land, water, air, and living things) work and affect each other. They run simple investigations to see, for example, how rain shapes soil or how plants change the ground beneath them.
Students look at how things like farming, building, and pollution change the land, water, and air. They also study how floods, earthquakes, and wildfires affect the places where people live.
| Standard | Definition | Code |
|---|---|---|
| Earth's Place in the Universe | Students explore where Earth sits in the solar system and how the Sun, Moon, and planets move in predictable patterns. They also look at clues in rocks and landscapes that reveal Earth's long history. | RI-SCI.ESS.3.1 |
| Earth's Systems | Students learn how Earth's major systems (land, water, air, and living things) work and affect each other. They run simple investigations to see, for example, how rain shapes soil or how plants change the ground beneath them. | RI-SCI.ESS.3.2 |
| Earth and Human Activity | Students look at how things like farming, building, and pollution change the land, water, and air. They also study how floods, earthquakes, and wildfires affect the places where people live. | RI-SCI.ESS.3.3 |
Students spot a problem, sketch out ways to fix it, then test their ideas and improve them until the design works better. This is the core loop of engineering.
Students look at how inventions change everyday life and how everyday needs push engineers to build new things. A new tool can reshape a community, and a community's problems can spark the next invention.
| Standard | Definition | Code |
|---|---|---|
| Engineering Design | Students spot a problem, sketch out ways to fix it, then test their ideas and improve them until the design works better. This is the core loop of engineering. | RI-SCI.ETS.3.1 |
| Links Among Engineering, Technology, and Society | Students look at how inventions change everyday life and how everyday needs push engineers to build new things. A new tool can reshape a community, and a community's problems can spark the next invention. | RI-SCI.ETS.3.2 |
Federally administered sample-based assessment in reading, mathematics, science, and writing. NAEP results inform state-by-state comparisons rather than individual student or school accountability.
Students spend the year asking questions, running small investigations, and explaining what they notice. They study forces and motion, weather patterns, life cycles and traits, and how living things share habitats. Most learning happens through hands-on activities, not reading about science.
Notice things together and ask why. Watch a puddle dry up, push a toy car down a ramp at different angles, or look at how a houseplant leans toward the window. Five minutes of wondering out loud builds the habits science class asks for.
Less than you might expect. Students are graded more on how they investigate and explain than on reciting definitions. Knowing words like force, habitat, trait, and weather helps, but students should be able to use them to describe something they actually saw.
Many teachers start with science practices through a short physical science unit, since forces and motion give quick, visible results. Life science fits well in fall and spring when outdoor observation is easy. Earth science and weather work well in winter when students can track daily changes.
Two things: writing an explanation that points back to what was observed, and telling the difference between a question students can test and one they cannot. Both improve with short, repeated practice across units rather than a single lesson.
Students ask a clear question, change one thing at a time, record what happens, and say what the data shows. The thinking matters more than the materials. A ramp, a stopwatch, and a few toy cars can produce a strong investigation.
By spring, students should be able to describe a pattern they noticed, back up an idea with something they saw or measured, and sketch a simple model of how something works. If they can explain a science idea to a younger sibling, they are in good shape.
Plan for two or three short design challenges tied to science units, such as building a shelter after a habitats unit or a ramp after a motion unit. Students should define the problem, test a design, and improve it. The redesign step is where most of the learning happens.