Being in the teaching profession is loving and very exhausting at the same time, you can imagine talking, talking and talking for several minutes explaining a particular lesson to your learners and at the end of the whole explanations you ask the learners "did you understand" and almost half of the class chorused NO ma, can you kindly explain again.........it will be as if the ground should swallow someone because within you, you felt you've done justice to the topic but the learners didn't understand a single thing from your explanations.