Summary: What's curriculum?

To provide a common cultural base for the whole country

To enable students to acquire and develop the knowledge, skills and values, and the associated capabilities and competencies to lead meaningful and productive lives.

Also known as explicit/overt/written

What's taught at school

"Set of formative influences that the school exercises systematically but that are not explicitly or formally recognized" (Jackson, 1968)

It derives from the school culture

Also known as excluded curriculum is that which is not taught.

Sometimes the teacher ignores some content or skill, deliberately or unknowingly. A teacher may consider some idea unimportant and ignore it. Similarly, teacher may avoid detailed description of some topic for the one or other reason, for example, evolution in Biology.