Online instruction is becoming increasingly common at universities; however, there is little single subject research concerning the effectiveness of the online lecture format. We investigated whether online lecture could replace in-class lecture in two sections of an undergraduate Introduction to Behavior Analysis course without detrimentally affecting student learning. Using an adapted alternating treatments design, online and in-class lecture formats were counterbalanced across the two course sections. Experimenters collected data on lecture attendance/access, percent correct on the weekly quiz, and student report on lecture format preference. The data show that, within the context of this class, students performed equally in the weekly quiz regardless of lecture format; further, that this is consistent when looking at individual student data and mean data. However, although students stated a preference for online lecture in the questionnaire, a greater percentage of students attended in-class lecture than accessed online lecture.

This yearlong dissertation study focused on understanding the experiences of domestic graduate mathematics teaching assistants (GMTAs) and the context in which they shape and develop their teaching views and practices. The intent of the study was to detail the teaching development of several GMTAs, determine the impact that their preparation programs had on their teaching, and identify other sources that influenced their teaching practices. Utilizing qualitative research methodology, consisting of interviews substantiated by observations, eight GMTAs were purposively selected and studied. Analysis provided the following findings.GMTAs are not a homogenous group; they bring with them different experiences, knowledge, preparation, and attitudes, all of which influence the way that they teach. In addition, a number of factors, many of which are external, played strong roles in shaping GMTAs' teaching practices. This study both identifies such factors and describes how they impacted the GMTAs' teaching practices.Preparation (training) programs were among these factors. Preparation programs can impact the teaching practices of GMTAs. This impact, however, is affected by the influence of other factors (such as course structure, time management, and limited pedagogical knowledge), which can support, constrain, or even counter-act the impact of training programs; this provides insight into why research has found programs to have limited impact on GMTAs' teaching. Furthermore, GMTAs are not always aware of the ways in which these programs impact their teaching; positive testimonials and attitudes toward training do not guarantee influence or impact on teaching practices, nor do negative ones; this suggests caution in using interviews as the sole basis for the evaluation of training programs.This dissertation provides detailed data stories for three of the participants. A list of factors and discussion of how they impacted their teaching practices is given. Some connections are made to research on K-12 teacher preparation. It shows the need for extended GMTA preparation programs, programs which provide significant instructional knowledge and which include guided instructional practices. For researchers, it shows the need to include classroom observations when studying and evaluating preparation programs, discussing the limitations of solely interview based findings.