What is the ruling on combining the intention of earning money for charity with the intention of teaching the Quran when memorizing the Quran for children? Is it permissible to teach the Quran without intensive theoretical study of Tajweed rules? Does not correcting some of the children's mistakes in recitation affect the permissibility of the money earned?

Scholars differ on the ruling of taking payment for teaching the Quran. The majority view is that it is permissible, so there is no harm for you in taking payment. Let the intention of seeking closeness to Allah and earning reward be the primary aim. Knowledge of Tajweed is not a prerequisite for teaching the Quran, as long as you pronounce the letters from their correct articulation points and give them their due. The payment is lawful if you exert your utmost effort in correcting and performing the task properly.