225 Ease of access. Just-in-time availability was a primary goal when creating instructional videos that are able to be accessed and viewed by students during the laboratory section. To quantify student perceptions of video availability, we asked students "Was the location of the video easily accessible?" (Table ). For each video's survey, ≥80% of students reported that the video was easily accessible; this indicates that utilizing quick-response barcodes near glassware or equipment relevant to the topics of 230 the QR videos allowed for easy video access, even when those resources are in physical demand. Helpfulness. Because our survey distinguished between students who did and did not report having previously learned the content of each QR video topic, we are able to compare these student groups' perceptions of whether the videos were helpful in performing the technique (Table ). We discern that most students found each video helpful and that there were no statistically significant differences between those who had and had not learned the techniques prior to viewing the QR video.