以下片段选自某节英语课堂教学实录，阅读并回答问题。
T: ... You all have finished the writing about how to protect our environment, right? Ok,now, it′s time to check in terms of the grammar, punctuation point and spelling.
S: (checking time)
T: Ok, now, who would like to share your papers?
Anna: ... We shouldn′ t throw rubbish everywhere ...
T: Your ideas are a little shallow, and the organization is a little disordered.
根据上面的教学片段回答下面三个问题：
(1)该片段呈现的是英语教学的什么课型?它属于该课型的哪个阶段?(4分)
(2)这节课的教学重难点是什么?(8分)
(3)分析该教师在这一阶段存在的主要问题，并提出相应的改进建议。(18分)