Notebook and slides for session 6
Revert "Rehide future lessons"

This reverts commit e7d5557e41b98c1d3a9482e07efb2b8cd56888bb.
Merge branch 'staging'

* staging:
  Notebook and slides for session 6
Revert "Revert "Rehide future lessons""

This reverts commit 528879c05641d4e011fff921e0e01d5cc95fa40d.