Using Variable-Object in open-elearning is essential when you need to present dynamic exercise. A variable present a new challenge each time the learner visits the exercise in a course.
1. Install a Numeric Variable
2. Install a text box to write the problem
Write this sentence : “A bathtub filled with ==fullwater liters of water has a hole that lets out 2 liters per hour. How much water will be left after 3 hours?”