I teach english to primary pupils and give them a full sight to everyday language and official language

From my prespective, i see to be a successful teacher you need to mix between education and entertainment While learning is a serious matter, that doesn’t mean that the way you teach should follow the traditional path. Depending on your teaching style and class goals, you can successfully integrate edtech tools and develop innovative edutainment activities that your students will love and remember for a long time.
It's important for students of any level to see new language repeatedly, but it's particularly important for very low level students who are seeing this language for the first time. Each time you work with the language, try to make it slightly different to give students more 'hooks' to hang their memories on. For example, include the language in reading and listening activities, and encourage students to use it in both speaking and writing. Seeing language in different contexts and with different images attached to it can also help memorisation.