MS-LS1-1 — Cells as the Basic Unit of Life

MS-LS1-1NGSSMiddle SchoolScienceLife Sciences
The standard

Conduct an investigation to provide evidence that living things are made of cells; either one cell or many different numbers and types of cells.

What students need to learn

Plan and conduct an investigation

Core

Students must engage in a scientific investigation rather than only reading about cells. They gather observations or data that help answer the question of whether living things are made of cells.

Teaching strategies
Use microscope lab investigations
Compare prepared slides of organisms
Guide students with data tables

Use evidence to support the claim

Core

The standard emphasizes evidence-based reasoning. Students should use what they observe in specimens, images, or models to justify the conclusion that living things are composed of cells.

Teaching strategies
Practice claim-evidence-reasoning
Annotate cell images
Discuss lab findings in groups

Understand that all living things are made of cells

Foundational

Students learn the core idea of cell theory that cells are the basic unit of life. This includes recognizing that both simple and complex organisms are made of one or more cells.

Teaching strategies
Introduce cell theory explicitly
Sort living vs. nonliving examples
Use anchor charts

Distinguish unicellular and multicellular organisms

Core

Students should recognize that some organisms consist of a single cell, while others are made of many cells. This helps them understand biological diversity and different levels of organization in living things.

Teaching strategies
Compare bacteria and protists to plants and animals
Create organism classification charts
Use videos of microscopic life

Recognize different numbers and types of cells

Extension

Multicellular organisms contain many cells that can differ in structure and function. Students begin to see that specialized cell types contribute to how organisms survive and function.

Teaching strategies
Compare plant, animal, and specialized cells
Use labeled diagrams
Connect cells to tissues and organs
Student-friendly “I can” statement

I can investigate and use evidence to show that all living things are made of cells, either one cell or many different kinds of cells.

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