Diary of a Wimpy Kid:The last Straw

Greg's school is passing out report cards, and when Greg showed it to his mom, she did not look happy. She was going to show it to his dad when he got home. Whenever Greg is in trouble, he invites his grandma over so Greg's dad won't go crazy right in front of his mom. When Greg's grandma was going to the casino to play bingo, Greg tagged along. He had trouble playing. The next day at school he flunks his science test. He could have stayed home and study instead of going to the casino to play 4 hours of bingo.