Math thinking doesn’t just happen during math class!
As usual, students in Room 123 started the day with our calendar routine and noted that it was the 50th day of school. I asked students if that meant we were half-way through the school year. After a pause for thinking time, students said no. Challenged to justify their thinking, students explained that 50 + 50 = 100 and we have more than 100 days of school each year. In fact, we have about 176 days of school each year.
I next asked if 176 is closer to 100 or to 200 and drew a number line to illustrate the question. After talking with partners, students determined that 176 is closer to 200. They shared three different methods they used to arrive at that conclusion. Take a look, and remember to click on the photo for a larger image!
Adler
good math. Wait till your in 4th grade math is harder.