Usages of schwärmen
Mein Bruder schwärmt von der neuen Lehrerin, weil sie so freundlich erklärt.
My brother raves about the new teacher because she explains things so kindly.
Meine Freundin schwärmt von dem Konzert.
My girlfriend raves about the concert.
Elon.io is an online learning platform
We have an entire course teaching German grammar and vocabulary.