How's it going? 'Wie' and the singular indefinite articles 'ein', 'eine', 'ein'

Lesson outcome

I can use the question word 'Wie?' to ask how things are going and can use the indefinite articles 'ein', 'eine' and 'ein' in contrast to the definite articles 'der', 'die', 'das'.

I can pronounce [ei] correctly.