From the November 1924 issue of Science and Invention Magazine:
"With the everyday added perfections in the transmission and reception of radio, such a remark as the above will soon be a thing commonplace. Little Mary Jane will enjoy her radio lessons as much as she now enjoys her bedtime stories. Everything will be an "open book" to her. A complete set in the shape of a leatherette covered book will take the place of bulky primers and readers. Home work will now be a great joy to the kiddies and lesson will be learned with much greater facility."
by Lepke2011