Lex Editor Guide
The teacher-facing route into the canonical Lex Editor documentation.
Who this is for
Teachers who need to build or edit lesson content, but do not want to browse the full editor reference first.
What this page answers
- What is the shortest teacher workflow in the editor?
- When should I use the Canvas or Lesson view?
- Which editor pages should I read first?
- How do I review generated Steps before publishing?
Prerequisites
- a course lesson you can open in edit mode
The shortest teacher workflow
When you open a lesson in the Lex Editor, most teachers only need to do four things:
- Choose Canvas (or
Canvas · {count}) on the floating bottom dock and create or review the ordered Lesson Plan Steps and Stage labels. - Write the whole lesson or an individual Step with AI, or use the Lesson blocks panel to add content by hand.
- Choose Lesson on the floating bottom dock to read and edit the lesson body, then review widgets and media.
- Save, clear test answers, and publish or assign the lesson when it is ready.
The Canvas and Lesson view buttons on the floating bottom dock have tooltips explaining which surfaces they change. The plan rail has a visible Hide the structure control; choosing Canvas again restores it. The two-pane workspace resize handle stays bounded within the layout to avoid accidental horizontal scroll bars. A planned lesson with no content remains in Canvas view until a Step is written, and a lesson without a plan offers to create one. These rules also apply to student self-study authoring.
Work with the Lesson Plan
The plan is a flat ordered list of Steps. A Step carries its type, time, exercise count, brief, and content. A Stage is a label for a run of Steps, not a separate container.
From a Step card you can:
- edit the Step settings and teacher note;
- show or hide the settings panel with the chevron;
- fold the Step's content from the Step actions menu;
- reorder, duplicate, or delete the Step;
- write an empty Step, retry a failed Step, or replace a filled Step after confirmation.
The rail's Collapse all and Expand all actions control Step settings together. Content folding is separate and affects only your view.
Blueprints and review
A Blueprint saves the Lesson Plan and Step settings without lesson content. It is not a content Template. Applying one replaces the current plan and content after a confirmation. On a published lesson, the result is an unpublished Working Copy; review the Working Copy and publish it when ready.
When whole-lesson generation is partial, completed Steps remain available while failed Steps can be retried individually. If the connection drops, keep the editor open while it reconnects, then check each Step card before saving or publishing.
Review widgets before publishing
AI-generated and hand-built widgets should be checked before a lesson is assigned.
Use Widget Edit Mode (eye icon) on the floating bottom dock to switch all widgets in the lesson into edit mode. Review the answers, options, instructions, and generated content. Click the eye icon again when you are finished so the lesson returns to normal mode.
Some widgets appear in edit mode immediately after AI generation, especially images and audio dialogue widgets. Review their prompt or script, then click Generate inside the widget to create the final asset. If you do not generate it, the widget remains an editable placeholder.
For pronunciation and other AI-audio activities, open the activity and generate or cache the required audio before assignment when the student should receive ready content.
Clear answers during review
Use Clear answers (eraser icon) on the floating bottom dock when you need to reset exercise state before publishing, testing, recording a demo, or assigning a lesson.
- With no selection, the floating bottom dock action clears answers and activity state across the document after confirmation.
- With selected content, the selection floating toolbar Clear answers action clears only the selected widgets or answer fields.
This is different from editing the correct answer. Clear answers removes submitted or test responses so the lesson can be checked or shown from a clean state.
Always clear teacher test answers before assigning a material to students. If the lesson document still contains teacher-entered answers, students can see those answers in their assigned copy.
Image tools during lessons
Image blocks are not only static illustrations. In the editor and live lesson context, image hover tools can support explanation and feedback:
- Draw to mark directly on the image
- Laser pointer to point temporarily without saving a mark
- Comment pin to attach a note to a specific spot
- Undo and Clear to manage saved drawing strokes
Use these tools for picture descriptions, map tasks, visual grammar prompts, handwriting-style correction, and live explanations where students need to focus on one part of an image. See Media: Drawing on an Image for the full reference.
Use the editor docs by task
Start Here
Interface basics, Canvas and Lesson views, saving, and your first lesson.
Interactive Widgets
Overview of exercise widgets, game widgets, and brain breaks.
Media
Images, audio, video, and embeds.
AI Features
Lesson Plan generation, Step retries, Ask AI, and related assistant tools.
What stays in the School Guide
The School Guide owns the teaching workflow around the editor:
- how lessons fit into courses
- how lesson content gets assigned
- how teachers use lessons in live sessions
- how lesson restrictions affect students
The editor itself is documented canonically in Lex Editor & AI.