Multiple “correct” answers are integrated into the learning system to allow individualized learning experiences in which navigation through the system is at {HEAD ~ a pace} controlled by {TAIL ~ the learner} 
controlled by
Multiple “ correct ” answers are integrated into the learning system to allow individualized learning experiences in which navigation through the system is at { HEAD ~ a pace } controlled by { TAIL ~ the learner }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL