In Noorani Qaida Page 12, The maddoleen lesson teaches you about the learning of maddah and Leen. You need to visualize the letters carefully. In this way, you will be able to learn them. The difference between maddah and Leen is that in maddah the letters are known as maddah letters. Similarly, Leen letters are also known as short vowels. If the letter has Fathah before alif it is known as alif maddah, If the letter has dammah before Waoo it is called Wao maddah. On the other hand, If the letter has kasrah before Yaa Sakin then it is known as Yaa maddah.

Leen are the ones who have Yaa Sakin and waoo Sakin after letters. For example, يَوْمِ in this word before Wao sakin there is fathah above letter so they are called Leen letters.