Step 1. Go to https://NYCDOE.ZOOM.US
...or you can click the zoom icon in the navbar.
Step 2. Click "Profile" in the menu on the left.
Step 3. Click "Edit" to the right of your name.
Step 4. Change your first and last name (as well as any desired fields).
Step 5. Click "Save Changes" to have that name reflected in all Zoom meetings.