Don't use Acrobat Reader, use Adobe Acrobat.
I have Adobe ACROBAT Reader. I am not getting something. Where is Adobe Acrobat? I thought that's what I have.
Unfortunately, Adobe changed the name of the free (what it used to be called) Adobe Reader to the free Adobe Acrobat Reader - which causes quite a bit of confusion among users. There are two different applications: The free Adobe Acrobat Reader DC, and then the Adobe Acrobat DC Pro or Standard,which is not free. You are on a Mac, that means that you have Pro, because there is no Standard version for the Mac.
Because you have a Student and Teacher license, we can assume it's for the full version of Adobe Acrobat. When you installed Acrobat, did it prompt you for the serial number? If so, and if you did enter your serial number, make sure that your documents are opened in Acrobat and not the free Reader. You can specify which application should take precedence by right-clicking on a PDF file, thens let "Get Info" from the menu. Now change the "Open With" to Adobe Acrobat Pro, and click on the "Change All" button right below the application selection field.
From now on, when you double-click on a PDF file, it should open in Acrobat and no longer in Reader.