_______ _______ developed a theory of moral reasoning

The 1950s saw a major contribution to the field of social psychology by which of the following individuals?

a. Gordon Allport for publishing The Nature of Prejudice b. Solomon Asch for studies in conformity c. Leon Festinger for two theories on how people learn about themselves and about how attitudes can be changed d. All of the above are correct

For collaboration between heterogeneous peers to succeed, teachers need to

A) provide the children with extensive guidance. B) provide repetitive drill and practice activities. C) hire formal tutors for students. D) develop a tracking system to measure individual and group progress.