Using the Alumni functionality.
The LinkedIn Alumni functionality allows you to connect with those that have a shared love of your school or university. A quick and simple search can produce a wealth of potential connections thanks to your former school.
All you have to do is go to your ‘Connections’ tab, and select ‘Find Alumni’. From there, you have the option to search users by location, subject studied, year graduated and where each user now works.
You can filter your results by first and second degree connections, which then allows you to see who you already know and who you can be introduced to. When you’ve narrowed down your list of prospects you can contact them directly, via InMail, using your common educational connection as the perfect starting point!