I think it would be very useful always to write the transliterated pronounce of all sentences, for example:
המשקפיים שלהם לא יפים.
= ha mishkafaim shelahem lo yafim.
= their glasses are not beautiful.
I beg Duolingo to do this.
Hebrew has that, it's called Nikkud. But considering a native speaker would almost never use it, why teach it? If you want to know the language, you have to learn to recognize the words without any help.