DS (year 12) would love to go to Imperial or UCL to study engineering but his current grades for maths, physics and chemistry is around the 60% mark. He is very quiet as a person so I'm not sure if this mark is effort or ability dominated. Teacher comments are along the lines of 'able but sloppy', 'too quiet so not sure to what extent he understands', 'needs to be more confident in his abilities', 'more effort needed'. To me these comments seem extremely vague. He is quiet, non-disruptive, hands work on time, spends at least an hour a day at home with his books. Any suggestions about what usually works to support less sloppy work? Where does one usually find extra practice questions beyond exam papers and textbook? He doesn't want extra help from a tutor. not that I can afford. Any STEM teachers in this forum or parents in a similar situation?