The Polya urn problem is a famous model of wide application in probability.

波利亚罐问题是概率论中的著名模型。

To use Prompting Method by G Polya to form their metacognitive ability and improve their ability to solve math problems.

应用波利亚“提示语”培养解题的元认知能力，改进解题策略；

Inheriting Polya 's mathematics thoughts and putting it into use, the author does some research on the students' through questionnaire by teaching.

本文通过对波利亚数学思想的继承和利用，从教学实践出发探索培养学生提出问题的能力。