Important factors for the kids are:
— Physical activity in a communicative context: doing exercises, repeating actions, dancing, playing games with motion.
— For a teacher — speaking English slower, distinctively, repeating phrases many times, motivating students to repeat.
— A lot of supplementary materials to touch: cards, toys, balls, cubes, modelling clay, etc.
— Interactivity: presentations, on-line games, video is obligatory, printed text-books are needed.
— Songs, games, cartoons — you may repeat them from time to time.
— Reading through the system of phonixes, not giving IPA (transcription):
https://www.starfall.com/h/ltr-classic/— Samples of speaking models provided, speaking through games and activities.