secondary education

Traditional second stage in formal education, typically beginning at ages 11–13 and ending usually at ages 15–18. The distinction between elementary education and secondary education has gradually become less marked, because of the proliferation of middle schools, junior high schools, and other divisions.

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• Secondary education
• A secondary consumer in an ecological sense
• Secondary dominant, in music
• Secondary, in American football and Canadian football, the group of (usually at least four) defensive backs
• A Secondary functional group (or usually ion) attached to carbon atom connected to 2 other Carbon atoms in organic chemistry
• Secondaries, the second-largest group of remiges (wing feathers), which attach to the inner lower arm
• Secondary circuit, electrical circuit in a Transformer in which current is produced by electromagnetic induction, as opposed to a primary circuit