Can you solve the lighthouse problem?

EDUCATION
The character dreams of being the first person to visit Mars.
Why don't all elementary schools teach kids to read using cats that yell "I am the Queen!"?
The art of turning puppets into believable characters takes years to master.
A new study suggests that reading information and hearing yourself speak it aloud is a more effective memory technique than reading silently or listening to someone else read.
The home computer typing tutor was such a hit that she kept getting invited for speaking engagements and interviews. Too bad she wasn't real.
Bedtime reading can get a boost from technology without screens.
In May 1924, hundreds of Klansmen descended on South Bend, Indiana expecting to hold a rally. What they got was a roving gang of college kids who beat them into pulp.