His grade was so bad that his teacher called his dad. When Johnny got home that afternoon, his dad was standing angrily at the door. “Why did you fail your math test?” he asked. Johnny shrugged and said, “My teacher isn’t very good.” Johnny’s dad was surprised by this excuse and asked for more details. Johnny explained, “Well, on Monday, my teacher said 3+5 = 8.”
“So?” his father replied. “Then on Tuesday, she told us 4+4 = 8, and on Wednesday she said 6+2 = 8,” explained Johnny. “If she doesn’t know what makes eight, how am I supposed to know the right answer?”