Describes an exercise which provides a small data set consisting of the localities where various genera of a fictitious group of fossil "Archaeomorphs" have been found on various continental blocks. The activity can be used to develop hypotheses regarding plate tectonic processes and the present arrangement of fossil localities. (TW)

Several studies of the validity of the intensive time-series design have revealed a post-intervention increase in the level of achievement data (the "momentum effect"). Reports on the development and use of a technique to study the effect as it is observed in several data sets on the learning of plate tectonics. (Author/JN)