Aprofessor wants to examine the effectiveness of a new teaching approach. she has a theory about how this new approach will work, and will use a methodical approach to test her theory. her 9: 00 a. m. class will be exposed to the new method of viewing teaching tapes while her 10: 00 a. m. class will be exposed to traditional lectures. she will assess the students' progress after six sessions. what method is the professor using to conduct her experiment?

Why should historians question edward ennis? a. they should not. ennis told the truth. b. ennis alerted his superiors to the existence of secret evidence but, when they ignored it, ennis did not make the evidence public. he remained silent. c. ennis made up his secret evidence d. none of the above

He chart shows the 112th u.s. congress (2011–2012). based on the information in the chart, if the independents in the senate chose to vote with the republicans in the senate, the republicans would

An externality can be created by a. people working at a production job and enjoying their work b. a production activity but not a consumption activity c. a consumption activity but not a production activity d. a production activity or a consumption activity externalities a. are always positive, and an example is flu vaccinations b. are always negative, and an example is the pollution created by trucks c. can be negative or positive. logging has a negative externality, and education has a positive externality d. can be negative or positive. a negative externality is having to go to school when you would rather go to the beach, and a positive externality is spending time with your friends