CREATE TABLE list (lastname TEXT, firstname TEXT, grade DECIMAL, classroom DECIMAL)
CREATE TABLE teachers (lastname TEXT, firstname TEXT, classroom DECIMAL)

Find the number of teachers who teach the student called CHRISSY NABOZNY.
SELECT COUNT(*) FROM list AS T1 JOIN teachers AS T2 ON T1.classroom = T2.classroom WHERE T1.firstname = "CHRISSY" AND T1.lastname = "NABOZNY"
SELECT COUNT(*) FROM "list" AS "T1" JOIN "teachers" AS "T2" ON "T1"."classroom" = "T2"."classroom" WHERE "CHRISSY" = "T1"."firstname" AND "NABOZNY" = "T1"."lastname"