The best teaching strategies involve problem solving with enough direction from teachers so that students gain useful knowledge, while also providing enough freedom so students can actively think about these problems themselves. This technique is called

Which of the following is true concerning the nonequivalent control group pretest/posttest design? a. Comparisons can be made between groups on the pretest and the posttest

b. Comparisons can be made within groups from the pretest to the posttest. c. Because participants are not randomly assigned to groups, we cannot say that they are d. all of the above

The fact that suicide tends to run in families can be explained by the fact that

a. psychological disorders which lead to suicide can be inherited. b. growing up in a home where suicide has occurred creates feelings of hopelessness and helplessness. c. suicide can be learned through the process of observation. d. all of these are possible factors.