以下是一位老师在教授六年级小学英语时设计的教学活动：

知识目标:

1. 学习名词性物主代词mine, yours, his, hers, ours, theirs

2. 学习生词comb, mirror, wallet, teapot, skateboard, calculator

3. 学习句型whose comb is this? It’s mine.

教师在课前请学生带来了各自的道具，有的是动物玩具，有的是日常用品，还有的是礼品。在学习完生词：comb, mirror, wallet, teapot, skateboard, 新授过以上几个代词之后，老师安排了失物招领的游戏，要求每个同学拿出所带来的道具，与组内的同学互相问答:要求使用所学句型:Whose…is it ? It's his/ hers/ mine/ yours.

T: Now, let's play a game “lost and found” Look, I have got a teapot here. Who lost it?

(教师走到一组同学，进行示范)

T: Whose teapot is it? Is it yours?

S1: No, it’s not mine.

T: (问另一个同学) Whose teapot is it? Is it yours?

S2: No, it’s not mine.

T: Oh, I am sorry. I don’t know whose teapot it is. Who can help me to find the owner? Can you help me?

S3: OK! (走到其他同学处) Whose teapot is it? Is it yours?

S4: Yes, it is mine.

T: Great! Please use the things and play this game. Try to find the owners of the things.

同学们对各自带来的东西非常感兴趣，完全忘记了应该使用的语言，很多同学用中文讨论起来，甚至有的同学互相取笑起对方的东西。教师请一位同学向全班同学汇报时，有很多同学根本没有注意听，而是继续关注其余同学的东西，还有很多同学对所带来的东西不知如何用英语表达，所以在交流使也有很多的困难，错误的英语引得全班哄堂大笑。整个活动处在一个较乱的状态中，教室里比较吵闹。请根据以上案例，回答下列问题：

(单一主观题) 请分析以上案例中存在的问题。