Poor parenting skills and a "general lack of respect" for authority figures are the two main reasons for declining behaviour among five to 11-year-olds, according to a new UK research.
It has been claimed that some kids grow up believing they are "irreproachable" because families are preoccupied with their rights rather than responsibilities, reports the Telegraph.
The study was conducted by Channel 4's Dispatches and the NASUWT teachers'' union.
In the study, some teachers told how they were confronted by "screaming and shouting" mothers and fathers after attempting to discipline their child.
One said: "It is guaranteed that once a child is reprimanded we will have an irate parent banging on the door the next day demanding to know why and insisting that their child is not to blame."
Another told researchers: "It does come to the point where certain children get away with appalling behaviour just because we don't want the hassle of dealing with certain parents."
One teacher said most problems stemmed from "hugely over-indulged children who think they are the only person in the class".
Some 2,242 members of the NASUWT were surveyed about standards of behaviour in UK primary schools.
The results were analysed by Dr Chris Derrington, senior lecturer in education at Northampton University, for a Dispatches programme shown on Monday, January 5.