нужно переделать в Past Simple

On Monday we had 5 lessons. The first lesson was Russian. At the lesson we wrote a dictation and did some exercises. Nick went to the blackboard. He answered well and got a "5". Tom didn't get a "5" because he didn't know. After this I went to the canteen. I ate a sandwich and drank a cup of tea. After school I changed a book and went home.