Weekends should be fun!!

When my youngest granddaughter (who will be 11 in a few weeks) came back to my house from school last Friday, I asked - as I always do - "Had a good day?"  Now I'm used to hearing "yeah - OK" or some such. so I was taken aback when she said "I've had better - I've a LOAD of homework to do over the weekend". So what's going on? It is of course these damned SATS which year 6s have to sit before the end of term. Her school are quite clearly panicking because these SATS are in no way for the benefit of the child, but do have an impact on the status of the school.  So my granddaughter is suffering and having her weekend spoiled purely for the benefit of the school - how crazy (and unfair) is that?