Skip to content

What does a student learn in ?

This is the year science becomes about testing ideas, not just learning facts. Students ask questions, plan simple experiments, and use what they find to explain how the world works. They look at forces that move objects, how plants and animals survive in their habitats, and how weather and the Earth change over time. By spring, students can run a hands-on test, record what happened, and explain their thinking with evidence.

  • Forces and motion
  • Habitats and survival
  • Weather patterns
  • Life cycles
  • Hands-on experiments
  • Engineering design
Source: New Jersey New Jersey Student Learning Standards
Year at a glance
How the year usually goes. Every school and district set their own curriculum, so treat this as a guide, not official pacing.
  1. 1

    Thinking like a scientist

    Students start the year learning how to ask testable questions, run simple investigations, and record what they notice. Expect kids to come home talking about predictions and what the evidence showed.

  2. 2

    Forces, motion, and energy

    Students push, pull, and watch how objects move. They explore how energy travels through sound, light, heat, and electricity, and look for patterns in what makes things speed up, slow down, or stop.

  3. 3

    Living things and their habitats

    Students look at how plants and animals grow, what they need to survive, and how traits pass from parents to offspring. They also study how living things in a habitat depend on each other for food and shelter.

  4. 4

    Earth, weather, and people

    Students study weather patterns, the land and water around them, and Earth's place in the solar system. They also look at how people affect the planet and how communities prepare for storms and other hazards.

  5. 5

    Designing solutions

    Students wrap up the year by acting as engineers. They define a real problem, sketch possible fixes, build a model, test it, and improve it based on what went wrong the first time.

Mastery Learning Standards
The required skills a student should display by the end of Grade 3.
Science and Engineering Practices
  • Asking Questions and Defining Problems

    Students ask questions about how things work and figure out what problem they are actually trying to solve before running a test or building something new.

  • Developing and Using Models

    Students build or draw a model (a diagram, a map, or a physical object) to show how something in nature works or how a design solves a problem.

  • Planning and Carrying Out Investigations

    Students plan a test, gather information, and check whether their idea holds up. This is how science actually works, not just reading about it.

  • Analyzing and Interpreting Data

    Students look at data from a science investigation and explain what it shows. They spot patterns, like which plant grew tallest or which material got hottest, and use those patterns to draw a conclusion.

  • Mathematics and Computational Thinking

    Students use counting, measuring, and simple math to help explain what they observe in science. A measurement or number makes a science idea clearer than words alone.

  • Constructing Explanations

    Students take what they observed or measured and use it to explain why something happened. The explanation has to be backed by evidence, not just a guess.

  • Engaging in Argument from Evidence

    Students look at two possible explanations or solutions, then use observations and data to argue which one holds up better. The goal is to back a claim with evidence, not just an opinion.

  • Communicating Information

    Students read science texts, diagrams, and videos to gather facts, then decide which information is trustworthy and share what they learned with others.

Physical Science
  • Matter and Interactions

    Students learn that all objects are made of tiny building blocks called atoms and molecules. Understanding how those pieces connect and interact explains why matter looks, feels, or behaves the way it does.

  • Motion and Stability

    Students explore how things start moving, stop, or change direction by pushing or pulling them. They learn patterns in how forces affect motion, like why a heavier object takes more force to move than a lighter one.

  • Students explore how energy moves from one place to another and changes form, like heat turning into light or motion. They learn that energy is not lost, just passed along.

  • Waves and Information

    Students learn how waves move energy from place to place and how people use waves to send information. Think radio signals, sound, and light.

Life Science
  • Structures and Processes

    Students examine the parts that make up living things, from the tiny cells inside a plant or animal all the way up to the larger systems those cells form together.

  • Ecosystems

    Students study how living things in a habitat eat, grow, and break down over time, and how those same materials cycle back into the ecosystem. They also look at how plants, animals, and other organisms depend on or compete with each other to survive.

  • Students study how traits like eye color or height pass from parents to offspring, and why children look similar to, but not exactly like, their parents.

  • Biological Evolution

    Students look at how living things are alike and how they differ, and explore why those differences matter for survival. This builds toward understanding how species change over generations.

Earth and Space Science
  • Earth's Place in the Universe

    Students study 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.

  • Earth's Systems

    Students study how Earth's land, water, air, and living things connect and affect each other. They look at what happens when one part changes, like how rain shapes the ground or how plants slow erosion.

  • Earth and Human Activity

    Students look at how things like farming, building, and pollution change the land, water, and air. They also study how earthquakes, floods, and wildfires affect the people living nearby.

Engineering, Technology, and Applications of Science
  • Engineering Design

    Students identify a problem, sketch or build possible solutions, then test and improve their designs based on what they observe.

  • Links Among Engineering, Technology, and Society

    Students explore how inventions change everyday life and how people's needs shape what engineers build next.

No state assessments at this grade
Students take their next one in Grade 4.
National Monitoring

NAEP (National Assessment of Educational Progress)

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.

When given:
biennial in winter
Frequency:
every two years
Official source
Common Questions
  • What does third grade science actually cover?

    Students study forces and motion, weather and climate, life cycles and traits, and how animals survive in different habitats. They spend a lot of time asking questions, running small investigations, and explaining what the evidence shows.

  • How can I help with science at home?

    Notice the world together. Watch the weather for a week and look for patterns, drop two balls of different weights, or sort backyard bugs by where they live. Ask students what they noticed and what they think is going on.

  • Is third grade science mostly reading or hands-on?

    It should be mostly hands-on. Students learn science by doing investigations, building models, and arguing about what the results mean. Reading and writing support the work, but the core is observing and testing ideas.

  • How should I sequence the year?

    Many teachers open with forces and motion because it gives quick, visible investigations and builds investigation routines. Weather and climate works well in fall and spring when conditions change. Life cycles and traits often anchor the middle of the year, with habitats and survival following.

  • Which skills usually need the most reteaching?

    Two things: writing a question that can actually be tested, and using evidence to back up a claim instead of just stating an opinion. Plan to revisit both across every unit, not just at the start of the year.

  • My child says science is just memorizing facts. Is that right?

    Not at this age. Students are expected to investigate, gather data, and explain what they found. If science feels like flashcards at home, ask what question the class was trying to answer and what the evidence showed.

  • What does a strong explanation look like at this age?

    A student states what they think is happening, points to something they saw or measured, and connects the two. It does not need to be polished writing. It needs a claim and a reason rooted in the investigation.

  • How do I know students are ready for fourth grade science?

    They can ask a testable question, plan a simple investigation, record data in a table or drawing, and explain a pattern using that data. They can also read a short science text and pull out the main idea.

  • How do I help if my child gets stuck on a science question?

    Resist giving the answer. Ask what they already noticed, what they could try, and what would tell them if their idea is right or wrong. Ten minutes of guessing and checking at the kitchen table builds the habit teachers are after.