The Appion Part 1 Workshop provides hands-on training for the Appion single-particle data processing workflow. Appion is a “pipeline” for processing and analysis of EM images; it is integrated with Leginon data acquisition, but can also be used stand-alone after uploading images or particle stacks. Topics include analyzing the quality of your data collection,correcting the CTF, generating and cleaning up stacks, and generating 2D class averages. An Appion Part 2 Workshop will be offered in the future to provide training for making initial models and doing 3D reconstructions. If you are interested in attending an Appion Part 1 Workshop, please email EMG@NYSBC.org. The workshop is limited to 10 attendees.