Did you know back in the 1910-1930 there was an attempt to educate via radio waves? http://iml.jou.ufl.edu/projects/spring01/declair/history.html
Let’s work that into Call of Cthulhu!
Distance Radio Education
Over the course of 1 month, a character may attempt to learn a skill via the standard education rules. However, the character gets a bonus die when they attempt to roll over their current skill, thus it is harder for them to do so. When a character succeeds on this check, they gain 1d4 points in that skill. No character may gain more than 20 total points in a skill via this method.