Note to above: If you can't help, why post???
A good way to start looking at postcolonialism is to look at colonialism - that is, a somewhat glorifying aspect to colonialism (in a nutshell). Working off that is post-colonialism, which looks at the negative aspects of colonialism and its repercussions. For example: Injustice towards those who do not speak the "colonised" language, unfair practices to the natives, loss of native culture etc etc