DREXLOs (Drexel University College of Medicine Video Learning Objects) have three modes, which allow for the active engagement of the learner and which allow for the assessment of the learner’s behaviors and skills in the educational process. Modes include:

1. OBSERVE: Playing back video clips in a predetermined sequence
   
2. NAME: Playing back random video clips out of the sequence and asking the learners to give their observations descriptive titles
   
3. DO: Asking the learners to actively build the sequence themselves, which works as follows: A descriptive title for the clip is entered in the system. The input is then analyzed and the user is provided with options. The selection of an option plays the corresponding video sequence – and the spot of this specific clip within the sequence is displayed.