How to teach the phonics to the 2nd and 3rd primary stage?

Hello,
Now I have got a group of 4 students teaching them at their home, they are at the 3rd Primary stage in Egypt. Their English course is “Time for English”…

They have got a lesson called “Phonics Time” and has 6 words.
1- Jacket
2- Jam
3- Jet
4- Yellow
5- Yogurt
6- Yo-yo

Do I have to teach them how to write each word orally? Or just the sound of J and Y?

This pictures are taken from the Teacher’s guide book.

But I don’t quite understand.

Say ʤ while pointing to the letter. Students repeat. Add acket to the right of j and say -acket, jacket pointing to the two parts of the word and then the whole word