Luke tried not to frown. That meant that Sarah Jane didn't know that Maria had moved away. She hadn't met Rani either. He'd have to be careful never to mention her. When she mentioned his exams, though, he grinned. "I pass them," he said honestly. "Perfect scores."
He nodded when she showed him her journal. "The one I have looks like that too. Are they all the same?" He made a mental note to do what she suggested. It was odd, thinking about not being able to remember something when he was always able to remember everything.
"I will," Luke replied sincerely to Sarah Jane requesting he always leave a note should he wander off. "If they're like the Doctor's psychic paper, maybe he would understand how they do..." Luke trailed off curiously. He wanted to learn how everything worked here because it was something he didn't know and he always got excited when he learned something new.