Christine wants to be a nursery-school teacher. while still in high school, she takes a class through which she works part of each day at the day-care center her school operates for the children of students, teachers, and staff. christine is participating in

Which two countries on the received the most total aid in 1948, the first year of the marshall plan?

Which institution includes radio televisions and movies

Using mr smith and his id, identify two potential internal validity threats that might affect the a—b design. tell me how that threat might impact conclusions in the a—b design. note #1: you cannot use maturation (since i already did that one for note #2: there are some mr smith id threats that won’t have much impact in a single case design.