Here's one from the spring of 1969:
In 10th Age we had Mrs. Jones, who stretched our curriculum in wonderful ways. One day, she had us push our desks to the walls, and taught us about Abstract Expressionism by having us drip and sling paint onto a large canvas on the floor. At the time, we thought it was supposed to be a secret from Mr. Kirk since we weren't learning fractions or whatever else was on the usual schedule, and Mrs. Jones' husband delivered the canvas sneakily through the classroom window. But now I look back and wonder if Mr. Kirk wasn't in on it from the start.