. 12 Oct 2025 .

Aunt JK:

• Enjoy your time with your mom. Parents are sorry.

• She (LTK) might have changed.

SWM:

• CMK — Next week do you want to do Table 2 or another topic?

• SWM — Table 2

. 5 Oct 2025 .

Today my friend’s son requested that, during his virtual math lesson, we discuss his essay for “Stump the Teacher”. For school he had been instructed to submit a passage of text that did not contain the name of the topic. His topic was transport phenomena. In California, he is in 7th grade.

Preparing for the lesson for 45 minutes before it started, I struggled. The boy’s father, a chemical engineer like I am, remembered more from our similar educations. But the focus caused by a deadline, and also the freedom to fail with friends, forced me to choose three stamps for my student:

• Conservation of mass is the simplest conservation concept.

• Conservation of momentum is a famous conservation concept.

• Forces change a momentum balance.