Help with Oxford Owl Activities

What do the buttons do?

Marking This is the marking button. Click it to mark your responses. You need to click the marking button again to make changes to the activity and move on to the next screen.
Reset This is the start again button. Click it to reset all your answers on the current screen.
Next This is the next button. Click it to go to the next screen in the activity.
Back This is the back button. Click it to go to the previous screen in the activity.

Why do some of the buttons become inactive?

next inactive Some buttons become inactive when you have clicked on the marking button. You need to click on the marking button again to make the next, back and start again buttons active again.

The next button is also inactive in some sorting and ‘drag and drop’ activities. It will become active again when all the tiles have been dragged into position on the activity screen.