where to get high school directories and more

Generally public schools hand out high school directories to current 7th graders in May/June. You should also be able to get a copy at a family welcome center.  I would call first, to make sure they have copies on hand:

https://www.schools.nyc.gov/enrollment/enrollment-help/family-welcome-centers

I also suggest you download last year’s high school directory: 

https://cdn-blob-prd.azureedge.net/prd-pws/docs/default-source/default-document-library/2019nychsdirectorycitywideenglish.pdf

The DOE generally takes down the previous year’s directory when the updated version is in full circulation. I still find it easier to skim through this—even a pdf is easier than trying to find at the MySchools site.  TIP: print out pages of schools you’re interested in and then update any info that has changed since last year.