The objective of the research was to investigate how 3D printing has been used in chemistry education research. We approach this via systematic literature analysis. Systematic analysis was chosen because we wanted to have a comprehensive overview from the field.
Systematic approach worked pretty well. The amount of published papers from this topic was under 50 so based on relevance sampling, we could include all of them into the analysis. We analysed rationales and objectives (data) that authors have set for their work. For the analysis framework we used technological pedagogical content knowledge (TPACK) model, which was chosen for 3D printing's edutech nature. Its chemistry educational use demands knowledge from technology, chemistry and most importantly pedagogy.
Our work was carried out via three research questions:
RQ1: What kind of work has been done in the field of 3D printing in chemistry education?
RQ2: What kind of design strategies have been used in developing TPACK through integrating 3D printing in chemistry education?
RQ3: How 3D printing has been used in chemistry education research?
Answer to RQ1
was the general overview of earlier work. Almost all earlier academic discussion has been about the suitable printing contexts which are mapped out extensively (see table 9 from the paper
Answer found for the RQ2 was quite interesting, because we find a fourth TPACK design strategy which was not introduced in the original design strategies paper (Koehler, Mishra, & Cain, 2013). The new found strategy was that 3D printing learning environment design started from mapping of TCK based needs which where solved through 3D printing and pedagogical PCK layer was added later in the second design phase. The renewed set of TPACK design strategies is
PCK TO TPACK
TPK to TPACK
Developing PCK and TPACK simultaneously (see Koehler et al., 2013
TCK to TPACK (NEW)
(added in Pernaa & Wiedmer, 2019
For the RQ3 we found that in chemistry education research, 3D printing has mainly been used for printing research instruments. Only few studies have investigated its effect on learning or students’ perceptions towards it.
According to earlier research, there is some evidence that 3D printing is suitable for student-centred activities for supporting the engagement in studies. But there is a huge lack of pedagogical models how to use 3D printing in a student-center way in chemistry education. This should be one of the future learning environment design objectives for chemistry educational 3D printing.
And from the laboratory safety perspective, it is important to remember that 3D printing process releases large amount of potentially carcinogenic ultra fine particles (UFPs) and volatile organic compunds (VOCs) (see Figure 1). 3D printing safety recommendations for chemistry education can be read from Bharti & Singh (2017
Figure 1. The most commonly used polymers (PLA and ABS) and the compounds emitted during 3D printing processes. (See Figure 3 in Pernaa & Wiedmer, 2019)