Many other analogies were mapped throughout the delivery of this chemistry course and during the period of time this research was being conducted.  They were not included in the scope of this study because they were either simple analogies and lacked complete mapping or they were presented later in the academic year and ample assessment data was not yet available.  Those simple analogies will be formalized into extended analogies when they are delivered in the future, and assessment data for the analogies presented late will be reviewed at the end of the semester.