Last week it happened. Just like every year at this time. School started. Backpacks waiting, open-mouthed. Crayons and markers ready to color little worlds. First-timers eager to learn to read and veterans with mortal dread of long division. What are your back-to-school memories? Each generation of students, whether those of us who had books waiting for us or those of us who now have pads and screens, shares the same thoughts. Will I be the firs…