Home address to attendance zone
Enrolment needs the zone a home falls in, and the addresses are children's. Geocode on your own machine and join the points to your zone map.
Geocode and join to the zones
gridpin join students.csv zones.geojson --sheet usa.bin -o students_zoned.csv
join geocodes each row and gives it the properties of the zone polygon it falls in. Rows whose answer is only a street or a town are marked: decide those by hand, not by a guess.
Reporting without the addresses
For a public report use --aggregate (counts by cell, no point) or --mask (each point moved at random in a ring): see publishing.