we teach quran with tajweed because correct pronunciation of the language of the Quran will reach the hearts of those who listen to it. That is why you must read with care, to absorb the meaning of the verses and to understand how to apply the laws and directives to your life. Tajweed is critical because without it, readers may change the meaning of the text without realizing they’ve done so.
If you want to learn the Tajweed rules, you must understand that Tajweed includes two parts: the scientific and the practical. The scientific is part of a collective duty that requires at least some Muslims to know specific Tajweed rules so they can share them with others. The practical includes the phonetic rules of reading and reciting the Quran so it is communicated properly and interpreted accurately.