Science as a discipline has gone through many paradigm shifts, both in terms of scientific knowledge and science pedagogy. One recent trend is the movement of science courses into an online environment. While this shift started as supplemental instruction, a movement in education is to offer entire science courses, normally taught in a face-to-face format, online. Moving science instruction into this type of environment illuminates many challenges in science education to a different and critical level. These challenges include issues in equity, accountability, identity formation, and appropriate pedagogical practices. The authors explore these challenges in general for online learning and specifically for teaching science online. It is clear that these issues, while heavily researched in face-to-face science instruction, have not been seriously considered in the online format. Currently it appears that those teaching science online have simply ported their face-to-face course without considering the fact that instruction needs to be changed when teaching online.

One of the goals of science education is to ensure that the discipline of science is accessible to all individuals. By many organizations this has been termed “Science for All,” and those who promote this idea also advocate the connection to science literacy. Teaching science in the online environment has been one way to offer science content to many different individuals, who do not necessarily need to be in the same location. Discourse in the science classroom is framed under situated cognition theory, whereby interactions between individuals are part of the normal culture of the classroom. For science knowledge to be adequately constructed by a student these interactions must be meaningful ones. This is especially important in an online science course where typically learning occurs through interactions between the students and the instructor, the students with one another, and within the individual themselves. As part of these online interactions, good reflective practice includes the different forms of feedback and the quality of this feedback. However, even with quality reflective interactions, there are barriers to science concept construction in an online environment. These barriers are discussed, and future research directions are suggested based on this review.

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