Emailed Exams
The company I work for - mainline 737 operator sends out tech quizes via email which are then checked by a TRE as part of the OPC/LPC sim brief.
The questions are VERY in depth and cause you to get the books out. Subjects are as per the tri-annual NOTECHS.
System seems to work well, but there is still nothing like being in a classroom with a whiteboard ...