They'll tell you Raheem really struggled, couldn't do two-digit multiplication -- so great data, but you're getting it back after school is over.
比如说，他们会告诉你如Raheen的学习有困难， 他做不了两位数的乘法——这数据多有价值啊， 可当你拿到这些数据时已经放暑假了。