**AP Physics 1: Oscillating Spring Whiteboarding**

Students whiteboarded some problems for a mass on a vibrating spring. They are recognizing the parallels to pendulums and successfully connecting a lot of the ideas I want them to connect.

**Physics: Projectile Whiteboarding**

Students whiteboarded some problems for horizontally launched projectiles. A lot of students are making good use of energy to simplify the math on the vertical motion and things seemed to click for a lot of students today.

**Chemistry Essentials: Bohr Model Whiteboarding**

Students used the Bohr model of the atom to whiteboard structures for some of the first 20 elements, also bringing in what we figured out yesterday about isotopes. I ask students to predict the two most common isotopes, which requires rounding the average mass both up and down, and a few students had some trouble with rounding to predict isotopes like H-2, but they were able to get there with some support.

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