First of all, you should know that the memory of adults is not as good as that of children. Shortcuts are indispensable. Your method is only a small aspect. To a large extent, it depends on whether mom has the idea of studying. The established pursuit can greatly promote the mother's enthusiasm for learning, and it is much easier to remember. I suggest you start with the teaching of Chinese Pinyin, which is a bridge for self-literacy in the future. So you should let your mother remember the spelling structure and pronunciation of Chinese Pinyin, just like the first-grade primary school teacher. Interspersed, but also teach my mother how to look up the dictionary. After learning a few pinyin, I often ask my mother to look up the dictionary and spell new words by herself. What you spell is more memorable than what others tell you. These basic courses are necessary. But it will take a long time for you not to work hard. As long as you have done it before, you can try to give your mother some simple primary school texts to read. If you don't know or understand, look it up in the dictionary. This kind of study and review from the shallow to the deep, coupled with the efforts of my mother and you, I believe that after one year, my mother will have great changes. Hang in there, you can do it!