The workshop is part of ESSLLI and is open to all ESSLLI participants. It will consist of five 90-minute sessions held over five consecutive days in the second week of ESSLLI. There will be 2 or 3 slots for paper presentation and discussion per session. One slot per day will be reserved for overview or retrospective talks. The first day of the workshop will include an integrative introduction to the topic. Submitters should keep in mind that this workshop is part of the larger ESSLLI educational program; presentations should be accessible to a broad audience from across the spectrum of ESSLLI areas.