Which phrase defines Jim Crow?

One common educational practice is to chart students' progress over time so that students can see their own improvement. these progress charts often lead to higher student achievement in the absence of other observable forms of reinforcement. the effectiveness of such charts in changing behavior illustrates the role of reinforcement as:

Throughout united states history, new groups of people have been given voting rights. this usually occurs through

Who built the first turnpikes in the united states? a) the national government b) state governments c) private companies d) town councils