Fewer school hours per day would permit students to have enough time to study, complete school assignments, participate in after-school activities and be able to get to bed by a decent hour. The school day is primarily seven hours long.
.ERB File Extension Information. .ERB is a file extension that belongs to Developer Files of N/A. Your Operating System will go through the registry, find the file association and then open .ERB file properly. .ERB file can be opened by many programs.
As @Chowlett mentioned before, erb stands for Embedded Ruby. When you define any file as .html.erb that means it's an HTML file with ruby code embedded in it and it is similar to .rhtml extension of rails file. You can see a detailed and nice difference between .html.erb and .rhtml Click Here