Bubble monster is used to display very short answer options in bubbles (it suits well for maths), and the students have to pop out the wrong answers.
To create a unit, navigate to For teachers - Learning units page, click Create new, and choose a unit type. To edit an existing unit, navigate to For teachers - Learning units page, find the learning unit in the list, and click the Edit button 
.
On the Bubble monster learning unit's edit screen you have the following fields for settings and unit content:
- Unit name - This name will be displayed in the lists of units.
- Labels - Create text labels, which describe the unit's content, purpose, target group, keywords, etc. Labels with multiple words and labels shorter than 3 characters are not supported.
- Advanced settings
- Score value - The points given after successfully completing the task.
- Correct answers required to complete the task (in %) - The percentage of correct answers required to successfully complete the task. If you have one question, the value should be the default 100%, but if you have more questions, more task screens, you can set any percentage of required correct answers.
- Task difficulty (label) - Select difficulty of the unit, which will be added as a label to the learning unit.
- Edit math formulas with Latex - This setting enables the use of a latex editor for creating math formulas.
- Task screen - This type of learning unit can contain multiple task screens. One task screen contains the instruction/question and the floating answer options. To add a new task screen, click the Add new task screen button below the actual task screen. During play, a new task screen appears after completing the tasks on the actual screen.
- Response time (minutes) - The time a student can spend on completing the given task screen.
- Number of tries - That's how much students can guess.
- Instruction/question - Instruction for the task or a question to answer. You can add a latex
and an image 
to this field. - Description - Description is used to describe what should the students do, e.g. Pop out the wrong answers!
- Answer options - Answer options to be displayed as floating bubbles. You can add an image and a latex to these fields. You can select correct answer options by checking the Correct answer checkbox at the left side of the answer field. You can add new answer options with the Add new answer option button.
- Enable info window - By enabling info window you can add an additional help text to the unit, which can be displayed by clicking on the Info button that appears on the unit's play screen. By enabling this setting, you can add a text, an image or a latex to the Info window text field.
- Convert learning unit to a superunit (add helping units) - see chapter Superunits
To check the unit's playable version, click the Save then the Preview button. After you finish editing, click the Save and exit button. This closes the editor screen and gets you back to the unit's list screen.