Complete each of the following sentences with ONE word from the article.

1. _______ at Singaporean secondary schools can benefit from the digital portfolio.

2. Learners create project groups on _______ so that they can engage with each other.

3. Students in Hong Kong can go on virtual trips to learn about the _______ of their city.

4. The Al application in Israel has been used as the primary distance-learning _______ by advanced physics students.