Try to make up a routine too so they get to know what is coming next. We did this with a group but the parents stayed as well and held the children on their laps (when they weren't doing actions or games). The parents learned along with the kids and often an even younger sibling. It helped with keeping their attention.
First was a kind of greeting with a song, "Hi, Hiroki, How are you? I'm fine thank you."
Then we did the weather and had pictures for the children to choose the kind of weather it was that day and an appropriate song - Rain, rain go away. As they got better we added the months, dates and holidays to a calendar.
Then we did colours - the rainbow and they jumped on circles spread out on the floor according to what colour we called or ran to touch something of that colour around the room.
Then we had pictures of a story song and sang that with appropriate actions, "If you're happy and you know it", "Incy, wincy spider" kind of thing.
Then we had flashcards of some theme - transportation, food, body parts
and so on and learned about 5 words per session and then played Slap.
They slap the card of the word that you say and get to keep it if they are right. Or they played memory or warmer, colder as we hid the flash cards and so on.
Then we had a paper kind of activity to cut and paste or colour on the same theme and reviewed the words individually while they did it.
Finally we had a goodbye song.
We used the picture dictionary from the series "Let's Go" as a basis for our lessons and the children had a little book that we called a Passport to English that we made with the 20 small pictures per page printed on a sort of track. They practiced each page as homework with their parents and when they could say all of them, they got a stamp in their passport.
Here are some more ideas
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