A 10-year-old pupil found that mathematics in grade five was really the most difficult lesson in his life.

Tutors, classmates, CD teaching films and teaching materials are useless.

Finally, parents decided to transfer their children to private primary schools, not ordinary private primary schools, but Catholic schools.

The first day of school came, and the little guy began to take risks in a great strange world.

After coming back from school that day, he walked past his parents, went back to his room and closed the door.

After working hard for two hours, I went out to eat and went straight back upstairs, doing my homework carefully until I went to bed.

This pattern continued day after day until the first report card was issued.

That day, the child walked into the house, put the envelope on the dining table and went back to his room to do his homework. His parents opened the report card. To their surprise, they got an A in math.

They rushed to their son's room in high spirits, excited about his progress.

"Are those nuns?" Dad asked.

"No." The son replied.

"Is it a prayer before class?" My mother asked.

"No.

"Is it a textbook, a teacher or a course?" Dad asked.

"No, it isn't. 」

"oh! So, what is the reason? " My mother asked.

"On the first day of school, I saw a man nailed to the plus sign. I know ... they're serious.