Martin now takes considerable pride in completing his fourth-grade homework assignments and in doing them well. he is quite disappointed when the teacher assigns an "a" to him for a project that he strongly felt deserved an a+ (or according to erikson's theory of psychosocial development, martin is in what stage of development?

The answer would be that Martin is in the stage 4 which is Industry vs. Inferiority. This takes place in the school years which is from age 5 to 11. Children then begin to develop a sense of pride in their accomplishments. If they are being encourage then the children can develop competence and would believe in their selves. If not, then they can doubt their abilities.

i am confused, what is the question? i can you out if you put it into more depth.