Have been using this method for a month with pupils.

Has been using for pupils to remember words, then sentences then paragraphs

Even up till paragraphs, it still work. But there are a few reflections.

1) Prevent wastage.

For whatever picture that pupils conjured with to remember whatever key words, make sure the pic is clean and easy to connect with other key words. Too much stand alone pictures cluttered the place to store the pictures.

2) Only use phonetic to create pic when the word hold no meaning to pupil, this is a direct contradiction to earlier reflection.

3) 10 sec rule If they can't think of anything within 10 sec, it's too long. Reset.

After they think of something, within 10 sec ask them to link back what they are supposed to recall, if link broken, choose another pic.

Conclusion:

It works wonder for my weakest but most ...