学得会，也做得出
Learn it, then build it
3D 互动实验课能拖、能转、能剖开看；知识图谱从一年级串到高中，答错一题就沿先修关系找到没学牢的那一步；错题本把错过的题变成下一次的练习。
Interactive 3D lessons you can drag, rotate and cut open; a knowledge graph from grade 1 to senior high that traces every miss back to its root; and a notebook that turns mistakes into practice.
浏览 3D 课Browse lessons 打开知识图谱Knowledge graph 我的错题本My notebook频道
Channels
知识图谱与前置诊断
Knowledge graphs & diagnosis
小学到高中，按课标与教材逐册铺开。选一个知识点开始诊断，答错会一路回溯到更早的学段。
Primary to senior high, laid out book by book. Start from any topic; a miss walks back to earlier grades.