A. The studens' exam result are good B. In Karen and Andy 's opinion , tablets are a good idea C . For the school 's head teacher , technology is important . 1 . After singular names or nouns we add 's 2. After plural nouns ending in s , we just add an apostrophe . 3. After more than one name the 's goes after the second name NHANH LEN qua thuong cuoi tuan