We started class by talking about my weird and hippie grading ways. Then we took our first quiz. I didn’t announce it ahead of time because I thought it would be better if we talked about how the grading would work right before they took it (and minimized the potential anxiety about assessments and grades). I think that worked well. Here’s what it looks like … Continue reading Day 12: First Quiz and Density Experiment in Chem 9
Most of our class time today in Chem 9 was spent building boats and following an only slightly edited version of this activity. In the morning, many students noted wearily that they had built boats to float pennies many times (even multiple years in middle school). I promised them that this activity would be different from what they had done before, but they didn’t believe … Continue reading Day 10: Building Boats in Chemistry
One of my Chem 9 sections needed to finish whiteboarding the final bit of the Mass & Change, so this morning started with the 9th grade’s best whiteboarding session so far. They talked for a (relatively) long time without any intervention from me, asking each other about whether the alka-seltzer dissolves like sugar (“breaking up into pieces that are so small we can’t see it”) … Continue reading Day 7: Volume in mL and cubic cm
On our third day of chemistry, we spent most of our time making and discussing whiteboards to represent each part of the mass and change experiments. Here is a great selection of the boards from various parts of the process. (Many of these boards were later edited because of different ideas in the discussions.) I especially loved that multiple groups started doing multiple snapshots of … Continue reading Day 5: Mass & Change Whiteboards
We didn’t answer that question today, but we asked it a lot. Almost everyone in the class has really wondered that on their own by now. One student has proposed that it has to do with the direction of the forces, but that didn’t get much traction (yet). We will come back to that question and idea soon enough. We worked through their findings from … Continue reading Day 3: What does a negative acceleration mean?
It was the first day of 9th grade Chemistry! We are starting a new science curriculum for our school, starting with this year’s 9th grade. In the past, they did a rotation of subjects for 6 trimesters. Now, they will start by all taking an untracked yearlong Modeling Chemistry course. I’m teaching two sections. Since the 9th graders change so much over the course of … Continue reading Day 2: Mass & Change and 9th Grade Chemistry