Incorrect letter articulation
Many beginners pronounce Arabic letters using familiar native-language sounds. Live correction of makharij is the fastest fix.
Ignoring elongation and stopping rules
Madd lengths and stopping points change meaning and flow. Short, repeated practice with a teacher makes these rules automatic.
Memorizing before correcting pronunciation
Memorizing with incorrect sounds locks mistakes into memory. Improve reading first, then memorize with cleaner Tajweed.
How to practice between lessons
Keep practice short: review the exact rule from the last lesson, recite slowly, and note one improvement goal for next class.