Best sites for edu link building?

https://mycped.tamu.edu/eportfolios/59712/Home/4_Effective_tips_for_successfully_Sending_Web_Directories

https://canvas.newschool.edu/eportfolios/33569/Home/7_Tips_to_Get_Deep_Links_to_Your_Site

https://otech.instructure.com/eportfolios/30577/Home/Why_Should_I_add_my_Website_to_a_paid_Web_Directory

https://mbsedu.instructure.com/eportfolios/160/Home/How_Can_Gain_permanent_Backlinks_by_Web_Directory_

https://mycourses.hult.edu/eportfolios/59716/Home/How_Search_engines_give_preference_to_quality_paid_link_directory_submissions

https://canvas.umn.edu/eportfolios/1499/Home/How_Improved_exposure_and_rankings_of_website_by_Web_Directory_

https://canvas.umw.edu/eportfolios/67620/Home/Is_Dark_Web_Monitoring_the_Best_Way_to_slow_Cybercrime