At skinner elementary school, teachers pass out "skinner bucks" to students who turn in papers on time, obey the teacher, and finish their homework. the paper "bucks" can be traded in at the end of the week for special treats or game-playing time on the classroom computer. this system most resembles a extinction

The republican party

Americans often speak of their country as one of several large regions.  these regions are cultural units rather than governmental units --  formed by history and geography and shaped by the economics, literature and folkways that all the parts of a region share. what makes one region different from another? a region's multicultural heritage as well as distinct demographic characteristics like age and occupation make regions different and special. within several regions, language is used differently and there are strong dialects. there are also differences in outlook and attitude based on geography.