This paper discusses ism al-‘adad wa al-ma’dud in the teaching and learning of grammar knowledge. The core of discussion revolves around Arabic language educators of various levels in institutions implementing the teaching of grammar knowledge for the topic ism al-‘adad wa al-ma’dud. A unique and interesting topic, it is frequently mentioned in verses of the Quran and Hadith. The target audience for ism al-‘adad wa al-ma’dud is students of all levels of education, be it in institutions of higher learning or schools. Educators and students of Arabic language in Malaysia are not native speakers of the language or ghair al-natiq bi al-‘arabiyyah. On that basis, misconceptions and confusion regarding ism al-‘adad wa al-ma’dud are bound to occur, especially among students and involving the issue of gender - muannath (feminine) and muzakkar (masculine). This paper attempts to uncover the concepts and operations of ism al- ‘adad wa al-ma’dud and the common misconceptions among students.