Who writes history and why does that matter?

I am supposed to start class with a daily warm up activity (never have done that in the past) so I have been trying to tie the questions to current events or using them as a way to start to get students to think critically. I asked them the following questions to get their brains going:

1. What does ‘discover’ mean?
2. Who discovered North America?
3. Who writes about history?

I had the students post them on their blog and then we had a class discussion about it (going to share/pair first). Some of my students understood the questioning sequence that I used and were able to figure out what I was trying to get them to think about. After the whole group discussion, most of my kids were able to leave class better prepared to think critically about history and historical context. I came up with this questioning sequence after I stumbled across the Stanford's Beyond the Bubble site and that  got me thinking about what I want my students to remember from this class. I will start to incorporate Stanford's Beyond the Bubble historically assessments as the year goes on to supplement my mandated multiple choice tests.