The biggest difficulty in learning Hebrew is learning to pronounce what the letters say. This is especially true if the niqqud is absent, as it is on Duolingo. Yet, for some reason, the pronunciation example is missing from a great many of the questions in the Duolingo Hebrew class. This is an example.
*Edit: As soon as I posted this and went back to my lesson, the very next question had the first example of niqqud I've seen on Duolingo. That will be helpful, but we still need the words pronounced aloud in each question, as they are in Japanese and Mandarin.
The Duolingo Hebrew course used real people/voice actors to read the sentences instead of the TTS computerized voices the other languages used. It was expensive to do it this way in order to get good native pronunciation, so they didn't/couldn't record every single word, just what was considered the most important to record for the program.