## School groups

# remove ++++++

# n_school(s :: SchoolGroups3) = UInt8(3);
# s_groups(s :: SchoolGroups3) = [:HSG, :SC, :CG];

# # Index from Symbol. E.g., :HSG => 1
# s_idx(s :: SchoolGroups3, edLevel :: Symbol) = 
#     findfirst(s_groups(s) .== edLevel);

# ------------