You are quite right to raise is issue cat......a level 4 was supposed to be an average child at the end of year 6.
Now, I'm not a maths teacher, but I do know that this means that half of the kids would be at 4 or lower, and half would be at 4 or above! That is what an average means.
Now the government would have us be like the residents of Lake Wobegone, where all the children are above average!
As a secondary teach I cannot say that the children I teach now are brighter, more able, or understanding more of science than those children with lower KS2 results in the past. And more than the children I'm churning out the other end understanding more about science. I'm teaching them to ger a GCSE in science. And that breaks my heart.
I don't have time to get them to think.
and the primary teachers don't have that time either.
and that is what science should be all about. Not the mindless aquisition of 'factoids'
I would far rather recieve a child at 11 who's teachers have had the time and resources to get them to read, write, do basic maths, and be enthusiastic about learning and who's parents have taught him /her how to function in soceity (take turns, share, have basic manners) than have a class full of level 5 children who have no idea of why they passed the test!
And this isn't having a pop at primary educators, god knows I do the same pointless thing at ks3 and 4!