1. Mr. Chen is an online teacher, who has more experience in mathematics teaching and deeper knowledge, and can better explain and master mathematical concepts. Teacher Zhao didn't use effective teaching methods and strategies to help students understand and apply mathematics knowledge. Therefore, Mr. Chen is right.

2. Teacher Chen Online chose better teaching materials and teaching resources, so that students can learn and master mathematics better. Teacher Zhao's online course resources are few and the coverage is small, so Teacher Chen is good.