2. In the column of literature options, click on "Journals", because core journals belong to the category of periodicals, and master's and doctoral dissertations are not included.
3. Enter the topic of relevant papers in the search bar, taking "Teacher Professional Development" as an example, and then click "Search".
4. As you can see at the bottom of the interface, there are more than 30,000 papers searched, and the types of journals are complex. Compared with other journals, core journals and CSSCI have more reference value. So either choose a periodical or narrow the scope of subject search.
5. On the right side of the interface, the first item is "Source Journal", followed by two "Core Journals" and "CSSCI", and the corresponding number of papers is in brackets.
6. Click "Core Journals", and all the papers retrieved in the interface are core journals. You can view several issues.