根据题目要求完成下列任务，用中文作答。
以下是某堂课的教学材料：
Betty: Hi Mum， can you hear me?
Mum: Yes， I can. Where are you?
Betty: I‘m standing on the Great Wall of China and talking to you.
Mum: Really?
Betty: We‘re on a school trip and we‘ve having lunch. And we‘re lying in the sun and we‘retaking lots of photos.
Mum: That‘s great， Betty. What are the others doing?
Betty: Well， Tony is eating an ice cream， and Lucy is buying some presents and postcards.And Tom is eating lunch and lying in the sun.
Mum: Can you send me a post card?
Betty: Yes. Lucy and I are writing postcards. We‘re enjoying the school trip a lot. Anyway，we‘re going home now. Bye!
Mum: Bye bye， Betty!
根据材料内容回答以下三个问题。
（1）这份材料属于哪种语篇类型?（7分）
（2）这份材料适合于哪种课堂教学?说明理由（至少写出两个要点）。（8分）
（3）分析教师选用文本材料时需要考虑的基本要素（至少写出三个要点）。（15分）