One of the students said "I've lost 7.4 kg (16lbs). I want to lose 10kg (22lbs) totally," as if she was deeply impressed.

Her initial goal was to lose 5kg (11lbs). After some weeks, she said she actually wanted to lose 10kg totally but she wasn't sure if she could do it so she had set her goal 5kg. 

But she lost 5kg when one term was over and said "I want to lose more weight, so I'll take the next term too. I want to 10kg."

Now she has 2.6kg (5.7lbs) to go. It's quite reachable. I have constantly told her she will lose that much, and now she thinks it will happen really. One more month to go. I will stand by her as much as possible.