Three-dimensional (3D) printing and related additive manufacturing technologies have started to displace traditional manufacturing in a wide range of industries and applications. The August, 2017 issue of MRS Bulletin highlights 3D bioprinting approaches, including advances and challenges in support materials and multimaterials printing, along with applications in tissue engineering and organs-on-a-chip. The talks in this webinar expand upon the articles in the MRS Bulletin issue, and attendees were able to interact–in real time–with the webinar presenters. This is Part 1 of 2.