Personal & Personalised Learning
Sometimes it is just worth the individual approach. Often this is added as 1-to-1 virtual follow-up post the two day course. This helps participants reconnect with the course, to review progress on personal objectives, and ask technical questions directly related to their real world experiences.
Some have used this as a way to privately review and significantly improve their personal presentation skills. Perhaps looking at your general style and delivery. Often best when looking to work on the design and/or delivery of a specific presentation coming up.
In other situations someone has had a very technical question which is best tackled in personal coaching.