Tool: website of educational institution.
1. Determine whether the school or educational institution has a white list system. White list system refers to the list of certified or qualified educational institutions, schools or educational products issued by the education department or relevant institutions. If so, you can consult the relevant departments of schools or educational institutions.
2. If schools or educational institutions don't have a white list system, you can try to search for keywords through search engines or related websites, such as "white list of education" and "list of certified educational institutions", and you may find some relevant information or resources.
3. If the above methods are ineffective, you can consult the local education department or relevant institutions to find out whether there is a relevant white list system or inquiry method.