Start with simple things, don't go into complex grammar. Probably like food, family, activities. Try to implement a little bit of grammar with vocabulary, but you have to listen to the need of your student to know what's best for them ;)

As for me, I teach little children. We start with learning animals and professions because it helps to explain and start using "to be". When I see that they understand all forms of it (+-?) and make their own sentences without my help, I give them pronouns and we do the same with them. And it's necessary to learn phonetics at the same time. The next is "to have", "can", question words, "to like" and Present Simple and then the basic course is started. But, of course, adults perceive the information in a different way.

Sumsum: I think that many learners make mistakes for one simple reason: they did not learn the verb "to be" WELL! So I suggest that you begin with that verb. Tell them to make affirmative sentences ("I am a man"), questions ("Are you a teacher?"), and the negative ("It is not warm"). Be sure to use "to be" in all the tenses (present, past, future). Do not continue to other aspects of grammar until your students understand "to be" PERFECTLY -- especially when it comes to making questions and negative sentences. So MANY beginning students want to use do / does / did for questions and negative sentences with the verb "to be." As you know, do / does / did are used for verbs OTHER than "to be." When they make questions or negative sentences with "to be," make sure that they do NOT use do/ does/ did. If your students leave you understanding "to be" perfectly, they will always be grateful to you. If they say, "Oh, 'to be' is so boring. Can't we study other verbs now?" you should explain to them that they will NEVER speak English correctly until they understand "to be" with 100% confidence.

Basics like numbers, colors, common objects, and some adjectives (tall, short, big, small) will go a long way. I like to make flashcards or sticky notes, label everything in the house in your target language! Say them out loud several times, and when you can connect the words to the object, make new and more difficult vocabulary to learn. Verb learning is also very important so that you can make full sentences. Focus on past/present/future before moving on to harder grammar.

hi? can you help me? please