The knowledge system of mathematics has a few different kinds of structure, logic structure, cognitive structure, structure of teaching materials and teaching structure.

数学知识系统有几种不同的组织结构：逻辑结构、认知结构、教材结构和教学结构，并且都有多种具体表现形式。

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This article discusses how to deal with the coherence, redundancy and relation concepts as well as the simplification of presentation and symbolization in teaching materials of discrete mathematics.

本文讨论了离散数学教材中严密性的一致问题，冗余概念问题，相关概念的一致问题及表述的简化和符号化问题。

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The new curriculum teaching materials have also been adjusted to new mathematics textbook in two parts, mandatory and optional two parts.

新课改的教材内容也作了调整，数学新教材分两部分，必修和选修两部分。

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