I highly recommend Super Simple Español on YouTube. They’re animated preschool songs in Spanish. They do an excellent job of covering a lot of basic vocabulary and occasionally introduce some advanced vocabulary while being catchy enough to help you remember the words. They have Spanish subtitles (but not English) so you can follow along and look up words you don’t know. It’s also good exposure to grammar (even if she hasn’t learned the formal grammar yet, when they cover the topics later it will help it click). As an adult learner teaching myself Spanish, I have found it immensely helpful.
https://m.youtube.com/@SuperSimpleEspanol/featured
If she wants to practice oral comprehension or pronunciation, Duolingo can be immensely helpful. Here’s the most effective method I have found to use it.
Close your eyes each time you go to the next question. If it’s one where they are saying something in Spanish try to catch it without seeing the cues. Replay any audio over and over again until you can easily understand it and can automatically process it. Then play it and repeat it. Then play it while you simultaneously say it so that you can any discrepancies between your pronunciation and theirs are evident. Try to pronounce it until the pronunciations match and then repeat several times so that it becomes automatic. If a pronunciation is too difficult, just work on it until you feel you’ve at least made some progress and then go on to the next question. You’ll have a chance to try again later, and as your general pronunciation improves, you’ll eventually get there.
This process is a lot slower than I think Duolingo intends, but I have found it extremely helpful. Since she’ll be progressing at the pace set by her class and just using Duolingo for practice, I highly recommend she try it.
As long as I’ve been using Duolingo the grammar instruction has been horrible, and they recently removed the feature that allowed you to ask fellow users for clarification on the questions. If she has questions about the exercises (and I almost guarantee she will), have her make a list to ask her teacher about later.
I also recommend a Spanish verb book if she doesn’t already have one. I have a copy of 501 Spanish Verbs. I know you can look up conjugations online, but the book makes it easier for me to see the patterns in tenses across verbs, and the patterns in verbs across tenses.
Spanishdict.com is an excellent resource for definitions of words and examples of usage. They have both Spanish and Latin American pronunciations of each word that you can listen to. They’re also a good resource to clarify grammar and usage of questions.