Answer: Social promotion
Explanation: The action is known as social promotion which occurs when students or pupils are promoted to the next higher grade or class regardless of whether they learnt the required materials for promotion or not. It also occurs if such student is frequently absent from classes. In this it helps increase the student's self-esteem despite learning difficulties that might have been encountered. Mary, basing on social promotion was moved into the next grade not minding her not mastering much of the material from the curriculum.