> ## Documentation Index > Fetch the complete documentation index at: https://docs.uflo.io/llms.txt > Use this file to discover all available pages before exploring further. # Manage Lessons > Add lessons, control when students can open them, and rearrange them. Each chapter holds lessons. A **Teach** lesson holds files and learning objectives, and a **Test** lesson holds an assessment. Your course may [use other names](/instructors/courses/create-a-course) for chapters and lessons. ## Add a Lesson Open your course, select a chapter, then select a button at the top of **Lessons**: * **Teach** for course materials, such as lecture slides and recordings. * **Test** for a practice assignment or a graded assessment. Chapters and Lessons panels with Cells and systems selected, and the Teach and Test buttons above the lessons highlighted. Chapters and Lessons panels with Cells and systems selected, and the Teach and Test buttons above the lessons highlighted.

Select a chapter, then choose Teach or Test to add a lesson to it.

 Enter the lesson's title. A description is optional. To hide it from students for now, uncheck **Students can see this lesson in the course.** Then select **Submit**. Lesson form for Cell membranes with a description, the visibility checkbox selected, and October 12, 2026 at 8:00 AM as the date the lesson becomes visible. Lesson form for Cell membranes with a description, the visibility checkbox selected, and October 12, 2026 at 8:00 AM as the date the lesson becomes visible.

A lesson's dates limit when students can open it.

 **Test** opens the **Assessment** form, with instructions, points, and [settings](/instructors/assessments/assessment-settings). Top of the Assessment form for Cell structure quiz, with its name and instructions fields and the visibility checkbox selected. Top of the Assessment form for Cell structure quiz, with its name and instructions fields and the visibility checkbox selected.

Test opens the Assessment form.

 ## Control What Students See Teachers always see every lesson. Two settings decide what students see: * **Visibility** hides a lesson from students completely. * **Availability** controls when students can open it. Right-click the lesson and select **Update**. Uncheck the visibility box, then **Submit**. Visibility checkbox of the Cell membranes lesson form, unchecked and highlighted, above the two date fields, with October 12, 2026 at 8:00 AM as the date it becomes visible. Visibility checkbox of the Cell membranes lesson form, unchecked and highlighted, above the two date fields, with October 12, 2026 at 8:00 AM as the date it becomes visible.

Uncheck the box to hide the lesson.

Check the box again to show it. A lesson in a [hidden chapter](/instructors/courses/manage-chapters#add-new-chapter) stays hidden. Fill in either date in the lesson's form, both, or neither: * **When does this lesson become visible?** is when students can start opening it. * **When does this lesson become hidden?** is when they can no longer open it. Select the icon in a field to pick a date and time. An assessment's due date is a separate setting in [Assessment Settings](/instructors/assessments/assessment-settings#due-date-and-lesson-dates). Each lesson shows a label with its current state. | Label | What students get | | -------------------------------------------- | ---------------------------------- | | **Visible** | Can open it at any time. | | **Invisible** | Don't see it. | | **Visible from: Mon, Oct 12** | Can open it from that date. | | **Visible until: Sat, Oct 10** | Can't open it after that date. | | **Visible from Mon, Oct 5 - To Sat, Oct 10** | Can open it between the two dates. | A crossed-out eye means students can't open the lesson right now. An instructor's Lessons list beside a student's, which has no Teach or Test buttons. Lines link each lesson's visibility label to what students get: Cell structure and Cell structure quiz can be opened, Cell membranes opens Oct 12, and Membrane transport is hidden from students. An instructor's Lessons list beside a student's, which has no Teach or Test buttons. Lines link each lesson's visibility label to what students get: Cell structure and Cell structure quiz can be opened, Cell membranes opens Oct 12, and Membrane transport is hidden from students.

Each label, and what students get.

## Reorder, Move, Duplicate, and Delete Right-click a lesson to open its menu, or press and hold it on a touch screen. Right-click any lesson in the chapter and select **Order**. Drag each lesson to its new position. Select **Confirm Order** at the top of the list. Students see the new order. To stop without saving, select the **X** beside **Confirm Order**. Lessons list in order mode with Confirm Order at the top and Membrane transport dragged above Cell membranes. Lessons list in order mode with Confirm Order at the top and Membrane transport dragged above Cell membranes.

Drag lessons into place, then select Confirm Order.

 Right-click a lesson and select **Move**. Drag a lesson onto a chapter under **Chapters**. Uflo moves it as soon as you drop it. Repeat for other lessons in the chapter. Membrane transport being dragged from the Lessons list onto the Genetics chapter, which shows Drop here, with Confirm Move at the top of the Lessons list. Membrane transport being dragged from the Lessons list onto the Genetics chapter, which shows Drop here, with Confirm Move at the top of the Lessons list.

Drop a lesson on a chapter to move it there.

 Select **Confirm Move** to leave move mode. Select **Duplicate**, then **Submit** to confirm. The copy includes its files, learning objectives, and settings. It keeps the original name, so make sure to update the copy's title. Students' submissions and per-student exceptions aren't copied. Deleting can't be undone. It also deletes everything in the lesson. Select **Delete**, then **Submit** to confirm. To take a lesson away from students without losing it, [hide it](#control-what-students-see) instead. ## Common Questions Not yourself. Duplicate and Move work only within one course. Select **Support** in the sidebar and tell the team which content to copy and into which course. Check three things in the lesson's form and its chapter's form: * The chapter is visible. * The lesson is visible. * The current time falls between the lesson's dates. Either may be blank. Students see the dates too. [Navigate a Course](/students/getting-started/navigating-a-course#understand-content-availability) shows what they see. ## Fill Your Lessons Upload slides, readings, and recordings to a Teach lesson. Describe what students should learn in each lesson. Choose how students take an assessment and how attempts become a grade.