Ateacher rewards his students by distributing plastic chips. students receive a chip for each instance of desirable behavior. at the end of each month, they can exchange their chips for prizes. the teacher sees major decreases in undesirable behaviors as a result of this system, which is known as:

it´s related to his charming character.

beauty is not everything, although we can joke that girls only care about the physical or material aspect, the truth is that a real woman looks at more important things, besides intelligence and personality, there are other attitudes that make irresistible to men who are 'unattractive'.

for example develop your sense of humor.

answer; ewing's sarcoma;