Science & STEM Education
Science education in the United States is guided by the Next Generation Science Standards (NGSS), adopted or adapted by 44 states and the District of Columbia as of 2025. NGSS represents a fundamental shift from memorizing science facts to engaging in the practices of science and engineering — asking questions, designing investigations, analyzing data, constructing explanations, and arguing from evidence.
NGSS Three-Dimensional Learning
NGSS is built on three integrated dimensions that work together in every standard:
| Dimension | Description | Components |
|---|---|---|
| Science and Engineering Practices (SEPs) | The behaviors scientists and engineers engage in to investigate and build models/systems | Asking Questions, Developing Models, Planning Investigations, Analyzing Data, Using Mathematics, Constructing Explanations, Engaging in Argument, Communicating Information |
| Crosscutting Concepts (CCCs) | Themes that bridge across science disciplines | Patterns, Cause & Effect, Scale/Proportion/Quantity, Systems & Models, Energy/Matter, Structure/Function, Stability/Change |
| Disciplinary Core Ideas (DCIs) | Key science content organized by discipline | Physical Science, Life Science, Earth/Space Science, Engineering/Technology/Applications of Science |
The 5E Instructional Model
The 5E Model (Bybee) is the most widely used instructional framework for NGSS-aligned science teaching:
| Phase | Purpose | Teacher Role | Student Role |
|---|---|---|---|
| Engage | Activate prior knowledge; generate curiosity | Pose a phenomenon, question, or discrepant event | Ask questions; make predictions; share prior knowledge |
| Explore | Hands-on investigation; initial sense-making | Provide materials; facilitate investigation; observe | Investigate, collect data, observe, record; work collaboratively |
| Explain | Develop scientific explanations; introduce terminology | Guide discussion; introduce vocabulary/concepts; connect to evidence | Construct explanations; share findings; connect to science ideas |
| Elaborate | Apply and extend understanding; transfer learning | Provide new problems/contexts; facilitate deeper investigation | Apply concepts to new situations; design solutions; extend thinking |
| Evaluate | Assess understanding; reflect on learning | Evaluate student understanding; provide feedback | Demonstrate understanding; self-assess; reflect on learning |
Science Content Overview by Grade Band
Elementary (K-5)
| Grade | Physical Science | Life Science | Earth/Space Science |
|---|---|---|---|
| K | Pushes/pulls; heating/cooling effects | What living things need; plant/animal relationships | Weather patterns; reducing human impact |
| 1 | Sound vibrations; light and shadows | Animal parents and offspring; mimicry | Sky patterns (sun, moon, stars); seasonal patterns |
| 2 | Properties of matter; wind/water changes | Seed dispersal; animal habitats; biodiversity | Earth's land and water; maps; erosion |
| 3 | Forces, motion, magnets; static electricity | Life cycles; heredity; variation; group behavior | Weather hazards; climate; fossils; environments |
| 4 | Energy, waves, information transfer | Internal/external structures; senses | Earth processes; rocks; erosion; natural resources |
| 5 | Matter conservation; chemical reactions | Ecosystems; food webs; matter cycling | Earth systems; water; stars; space |
Middle School (6-8)
- Physical Science: Atomic structure, chemical reactions, forces and motion, energy transfer and conversion, waves and electromagnetic radiation
- Life Science: Cell biology, genetics and heredity, evolution, ecosystems and biodiversity, human body systems
- Earth Science: Plate tectonics, weather and climate, Earth's history, human impacts on Earth systems, space systems
High School (9-12)
- Biology: Molecular biology, genetics, evolution, ecology, human body systems
- Chemistry: Atomic theory, periodic table, bonding, reactions, stoichiometry, thermodynamics
- Physics: Mechanics, energy, waves, electricity/magnetism, nuclear physics
- Earth Science: Geology, meteorology, oceanography, astronomy
- Environmental Science (AP): Ecosystems, biodiversity, pollution, sustainability, climate change
Engineering Design Process
NGSS integrates engineering and technology throughout all grade levels. The engineering design process provides a structured approach for students to identify and solve problems:
- Define the Problem: Identify the need; specify criteria and constraints
- Research & Brainstorm: Investigate existing solutions; generate multiple ideas
- Plan & Design: Select the best solution; create detailed plans/blueprints
- Build a Prototype: Construct a working model using available materials
- Test & Evaluate: Test the prototype against criteria; collect data; identify weaknesses
- Iterate & Improve: Modify the design based on test results; rebuild and retest
- Communicate Results: Present findings, including data, reflections, and next steps
Lab Safety Essentials
| Category | Requirements |
|---|---|
| Personal Protective Equipment | Safety goggles, lab coats/aprons, gloves (as needed), closed-toe shoes |
| Safety Equipment | Eye wash station, fire extinguisher, fire blanket, fume hood, first aid kit, safety shower |
| Chemical Storage | MSDS/SDS sheets accessible; proper labeling; segregation by type; locked cabinets |
| Student Conduct | Safety contract signed before labs; no food/drink; no horseplay; follow all procedures |
| Teacher Responsibilities | Pre-lab safety briefing; demonstration of procedures; supervision at all times; incident documentation |
⚠ Important: All science teachers should complete a lab safety audit annually. The American Chemical
Society (ACS) and National Science Teaching Association (NSTA) provide comprehensive safety guidelines and checklists.
STEM Integration Approaches
- Project-Based Learning: Multi-week projects addressing real-world problems integrating science, math, technology, and engineering
- Maker Spaces: Dedicated spaces for hands-on creation, prototyping, and tinkering with materials and technology
- Robotics/Coding: FIRST Robotics, VEX Robotics, Scratch, Python, Arduino projects connecting CS with engineering
- Citizen Science: Students contribute to real scientific research (eBird, iNaturalist, Globe Observer, Zooniverse)
Resources: Download NGSS-aligned lesson plans, lab safety checklists, and STEM project guides from
our Resources page.