Yes, exactly this. The amount of children who lost interest in a topic because of systems like this must be high. I clearly remember how I thought maths was way

Yes, exactly this. The amount of children who lost interest in a topic because of systems like this must be high. I clearly remember how I thought maths was way too easy and eventually I lost interest. Sadly I was lazy so I didn't do anything to use my skills (though one could argue it isn't the job of the child) and ended up not doing all my homework and just making up the answer on the spot when called to the blackboard, so today I'm very average which I guess is a success in the eyes of the system.