In which: lost and found

Item 1: hard drive containing 12 years worth of lessons (believed lost for 20 minutes this morning)
Item 2: half a term's psychology notes
Item 3: upwards of 70 hours per week. It's 10.30 and (as usual) I'm still working. I left school at 8pm.
Item 4: the look of a teacher who has found the 12 years of lessons hitherto believed lost