Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_name_81 (school VARCHAR, ihsaa_class__football_class VARCHAR)

### Question ###
What School had 3a/2a as the value for IHSAA Class/ Football Class?

### Accurate SQL ###

SELECT school FROM table_name_81 WHERE ihsaa_class__football_class = "3a/2a"