Currently you are able to search by school rating and grade level by enabling schools in the filters tab. To search by a specific district, please set your school preferences and type in the county the school is located in to the search bar. Here are instructions on how to do so:
1. Log in to your Zillow app
2. Type in the location desired into the address bar
3. Go to "Filter" >> Switch 'Schools' to ON >> choose your criteria
4. Check mark 'Only show me homes matching all criteria'
From here, you can click on the school that you want to view homes in and there should be an option to click "only view homes in this school boundary"