Even strong candidates lose 5–8 marks per paper to recurring slips. Cleaning these up is the single fastest score-improver you can make.
Misreading the question
Especially in maths: "what is half of 60?" answered as "what is 60 doubled?". Train your child to underline the actual question.
Switching letters in multi-choice
Thinking the answer is B but marking C. Slowing the marking moment to a beat eliminates most of these. Practice now in mock mode to drill the marking pause.
Not noticing units
Calculating in centimetres when the answer is required in metres. The "kilo-cm-m-mm" lapse costs marks every paper.
Leaving blanks
Every blank is a zero. Even a wild guess gives a 20% chance of being right. The last two minutes are for filling everything in.