We always did the reading log, it but made it up. Sometimes you read an hour one night but play with Legos the next...that translated to 1/2 hour for two nights. (We never lied about the books read...more like the time and day portions). My kids read plenty over the half hour a night I was NOT going to let a silly reading log run our life schedule if we were skipping a night.

I explained to the boys the idea of average reading time over a whole week and that we weren't lying as much as coping within the confines of the institutional regulations while still meeting the goals of getting kids to read. And the boys always tested years and years above grade level so I felt like they were lucky we were filling it out at all. So far faked reading logs have not led to a life of crime.