---
title: ' plains'
slug: plains
---
<!--
Basic level curriculum. Even if the "correct technical terms" must be used, the words used, the style of the sentences must remain very accessible. Courses at this level must overcome any language problem to address the greatest number in all situations.

If possible, introduce the useful notions by staying closer to physical perceptions: cling to the perceived reality every day, stay closer to the senses.
-->
