Correspondence education is a form of distance education, and teaching and learning are carried out through letters, mails and the Internet. Students can study independently at home or at work, study according to their own time and progress, and communicate and guide with teachers remotely.

Compared with general education, correspondence education has the following differences:

1. Learning style: Distance teaching is adopted in correspondence education, and students can study according to their own time and place, which has great flexibility and autonomy. General education usually requires students to go to school for face-to-face instruction and study.

2. Teaching resources: Correspondence education provides teaching resources through letters, mails and the Internet, and students can learn through textbooks, handouts and videos. General education usually depends on teaching facilities and resources, such as classrooms and laboratories.

3. Teaching interaction: Correspondence education carries out communication and interaction between students and teachers through letters, emails and the Internet, so that students can ask questions, answer questions and exchange opinions. General education is usually face-to-face and interactive.

The significance of correspondence education is mainly reflected in the following aspects.

1. Providing educational opportunities: Correspondence education can provide educational opportunities for those who cannot attend general education, such as workers, housewives and the disabled. They can acquire academic qualifications and knowledge through correspondence education and improve their own quality and ability.

2. Provide flexible learning methods: Correspondence education has great flexibility, and students can study according to their own time and progress, regardless of time and place. This is very beneficial to those who have work, family and other affairs.

3. Promote lifelong learning: Correspondence education can promote the concept of lifelong learning, so that students can constantly learn and improve themselves in their work and life. Students can choose learning content and learning methods according to their own needs and interests.

In a word, correspondence education is a form of distance education, and teaching and learning are carried out through letters, mails and the Internet. Compared with general education, it has the advantages of flexibility and autonomy, which can provide educational opportunities for those who cannot participate in general education and promote the concept of lifelong learning.