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Building a Challenge - Trim

How to create a trim challenge when building a lesson.

Misha Tenenbaum avatar
Written by Misha Tenenbaum
Updated over a week ago

In a trim challenge students are asked to adjust clips in the timeline using the basic trim, ripple trim or roll trim tool (learn about creating challenges).

  • Example: Ripple delete a clip in the timeline to remove a repeating word.

In the example shown here, a student must first:

  1. Look at the timeline for a hint about which tool to use

  2. Select the trim tool needed for the lesson

  3. Trim the clip as needed

After submitting the answer, students will see the possible choices.

Creating a Trim Challenge

From the lesson panel, add a challenge and choose the challenge type trim.

NOTE: Once a challenge type is set, it cannot be changed.

Complete the required information: Challenge name, question type, description, max score, and comment for unmarked sections. Hint is optional.

  • Max score represents the total points for the challenge, meaning all the correct answers are combined. Remember, challenges can have more than one correct answer.

  • Comment for unmarked sections means the message that students will see if they leave a marker on a portion of the timeline to which you did not set an answer.

Build a Timeline or Use a Template

Next, build your timeline by importing footage or select a template.

Import or use the Media Browser

Import footage into EditMentor

After importing footage, you will build a timeline in the editor. EditMentor includes editing tools like marking in-point, out-point and using insert and overwrite edit.



Templates are prebuilt timelines and library clips that you can use for lesson building.

  • Note: Before you can save your challenge, you must build a timeline and add at least one correct answer.

Adding Answers

When your sequence is ready, press add answers.

Select the clip that you wish to place an answer on. When you do, the clip will light up with two trim indicators at the ends of the clip.

Select the trim tool required for answering this challenge.

  • Note: Trim challenges can mix trimming tools within the challenge. However, only one tool can be applied to a trim indicator at a time. For example, you may add answers to ripple trim clip A and roll trim clip B. You may not add an answer to ripple and roll clip A.

EditMentor Trim tools
  • Note: Tools from left to right: Basic trim, ripple trim, roll trim.

With the proper tool selected, adjust the trimming indicator to the desired location.

The information panel will open. Enter the answer type, a description that you want to appear in the answer flag that students see and a score.

Notice that the trim type is set to ripple trim in the image below. The trim type is determined by the tool that you last selected before using the trim indicators. The trim type cannot be changed after it is set. To change the trim type, you will need to remove the answer and reapply it with a different trimming tool.

Notice that in the selected clips section, the clip 1-5 (b).mov is listed twice. This is because both audio and video will be trimmed together.

  • Note: If you want to only trim the video or audio then you will need to unlink a clip. We will discuss this at the bottom of the article.

A clip with an answer applied will have a colored section.

Clips may have many answer range applied to them.

  • Note: The first answer in any challenge must be correct. Therefore, it is recommended that in a trimming challenge type, teachers create a correct answer on a random clip at the end of the timeline. That answer should be deleted later. However, creating it will allow you to have the first answer on a trimmed clip be incorrect.

Once all answers are added press stop and save in the upper right corner of your browser.

Changing Answers

At anytime you may press add answers again from the information panel. To change an answer range, double click it to open the information panel once again.

To remove an answer range, hover the mouse over the range and press remove range.

Linking and unlinking clips

To link or unlink a clip you must be in editing mode. If you are in the mode that allows you to add answers press stop and save first.

Right click on the clip for which you'd like to change the link state. Depending on the clip's current link state, you will see the option to link or unlink.

  • Note: You may select any two clips and link them together.


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