21 May 2006
- 09:0309:03, 21 May 2006 diff hist +7 Lesson activity →'''''Correct answer matching a regular expression pattern'''''
- 09:0009:00, 21 May 2006 diff hist −2 Lesson activity →'''''Correct answer matching a regular expression pattern'''''
- 08:5908:59, 21 May 2006 diff hist −7 Lesson activity →'''''Correct answer matching a regular expression pattern'''''
20 May 2006
- 12:1712:17, 20 May 2006 diff hist −1 Lesson activity →''''' Correct answer matching a regular expression pattern'''''
- 12:1712:17, 20 May 2006 diff hist +281 Lesson activity →Short answer
- 11:0011:00, 20 May 2006 diff hist +296 Lesson activity →Short answer
- 10:4610:46, 20 May 2006 diff hist +524 Lesson activity →Short answer
- 10:2110:21, 20 May 2006 diff hist +5,390 Lesson activity →Short answer