2nd Grade Science Scope & Sequence Guide
A science scope and sequence organizes phenomenon-driven units across the four NGSS domains — physical, life, earth and space, and engineering — with investigation, literacy, and application woven throughout.
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NGSS-aligned science pacing leads with phenomena and builds toward explanations over multi-week units. Each unit should develop a disciplinary core idea through science practices and crosscutting concepts. Aim for 3–5 major units per year, each deep enough for genuine conceptual change — plus engineering design integration at least once per semester.
Typical Units for 2nd Grade Science
Unit 1: Physical Science Foundation
7–9 weeksMatter, forces, motion, energy, or waves depending on grade level — using investigations and models
Key Standards Focus
- ›Physical science DCI relevant to grade
- ›Planning and carrying out investigations
- ›Cause and effect as crosscutting concept
Unit 2: Life Science
7–9 weeksOrganisms, ecosystems, heredity, or biological evolution depending on grade band
Key Standards Focus
- ›Life science DCI relevant to grade
- ›Developing and using models
- ›Systems and system models as crosscutting concept
Unit 3: Earth & Space Science
7–9 weeksEarth's systems, weather, geology, astronomy, or climate depending on grade band
Key Standards Focus
- ›Earth and space DCI relevant to grade
- ›Analyzing and interpreting data
- ›Scale, proportion, and quantity as crosscutting concept
Unit 4: Engineering Design Integration
4–5 weeksProblem-solving challenge integrating content from the year's units
Key Standards Focus
- ›Engineering design process standards
- ›Constructing explanations and designing solutions
- ›Influence of engineering on society
Assessment Windows
Pacing Considerations
- ›Phenomenon-based units need 1–2 weeks to anchor the phenomenon before diving into investigation
- ›Lab and investigation days require more setup/cleanup time — build 15-minute buffers into lab days
- ›Safety training must happen in September before any lab work — don't squeeze it
- ›Cross-curricular literacy integration (science notebooks, text analysis) adds value but needs to be planned explicitly
- ›Field trips, labs with live specimens, and outdoor investigations need 4–6 weeks lead time for logistics
Vertical Alignment
From Prior Grade
Review which phenomena and concepts were built in the prior grade — your unit should explicitly connect to or extend that foundation
Toward Next Grade
Identify which NGSS performance expectations at the next grade depend on what you're building this year — plan for transfer, not just coverage
Planning Tips
Frequently Asked Questions
How do I sequence the four NGSS domains across a school year?
There's no required sequence, but starting with physical science often builds foundational vocabulary (matter, energy, force) that applies to life and earth science units. The engineering design unit fits well as a semester capstone because it applies DCI from the preceding units.
How many investigations should each science unit include?
Aim for 2–3 major investigations per unit — one anchoring phenomenon investigation, one deeper data-collection investigation, and one culminating application. Supporting mini-investigations can fill individual lessons without derailing the pacing.