Social practice is a relatively broad term. Generally speaking, as long as you consciously contact the society, it belongs to social practice, so the part-time job, internship and part-time job you mentioned above are all activities to participate in social practice.

Practice is characterized by clear purpose, which is the test, verification and application of theoretical knowledge, so the internship unit you choose is often related to your major.

The characteristic of part-time job is that it is paid, and the nature, industry and position of the job are not important.

Social practice in a narrow sense refers to holiday practice or off-campus practice. It is of great significance for college students to deepen their understanding of this major, confirm suitable occupations, prepare for the transition to the workplace, and enhance their competitive advantage in employment. Some students also hope to do part-time jobs during the summer vacation to save a sum of private money.

Stay in school, work-study program, tutor, odd jobs and so on pay more attention to economic interests, which is the first choice for some poor students; Students with a certain economic foundation choose to volunteer to support agriculture and teach, which not only exercises their ability, but also contributes their love; More students tend to choose professional-related internships (including paid and unpaid), as well as activities in practice bases or military training bases in primary and secondary schools, which are commonly known as "social practice", mainly pottery, handicrafts, computers, outdoor development and so on.

References:

Baidu Encyclopedia-Social Practice