Which of the following best describes economic activity in a recession?

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:

What specific words do you hear in dr. king’s speech that are powerful

President jefferson called a "wall of separation between church and state."