G3.S-02Ages 8–9 · Grade 3 · Science
Human Anatomy (Skeletons & Muscles)
Science & Innovation
Your child can explain how the human skeletal system protects vital organs and works in tandem with muscles to allow movement.
In real life
After a long climb, your child presses their ribs and says, "These are like armour for your heart." Then they flex an arm to show the muscle doing the pulling.
Ages are the anchor. Grade names are Ivy Waters stage labels for this framework, not a claim about any national school system.
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Ivy Waters International Standards · Version 2.2.0 · 2026 · © 2026 Ivy Waters International. Licensed under CC BY 4.0.