I have been turoring for 5 years for students from P1 to P6. With the students and parents co-operation, the students tend to improve in their grades. For instance, when a tutored a P5 and a P3 student, who used obtain between C grade in their English, Maths and Science but within 6 months they had improved their grades improved to B grade.
I tutored another student from P1 to P2. He always got above 90 marks for English and Mathematics and his behaviour improved after i started tutoring him.
I have taught English, Maths and Science. Nonetheless, I prefer teaching Maths and Science.