andrewacct: Andrew Marsee Accountability Functions

This function takes a student level dataframe and aggregates it to the school/district/state level. Provides sums and means for desired columns.

1	agg_student_level(df, op_list = list(), ...)

`df`	Dataframe. Used first to be friendly to the %>% operator.
`op_list`	A named list where the name is the operation and the value is a character vector of column names to apply the operation to
`...`	The columns to aggregate at (e.g. system, system_name, school, school_name)

## Not run: 
agg_student_level(student_level_df,op_list = list(sum = c('enrolled', 'tested', 'valid tests')),
system, school, subgroup)

## End(Not run)