Reflection: High Expectations Reactivity and the Periodic Table - Section 2: Do Now/Activator


The day before this lesson I attended a conference. I was faced with uncertainty about who would be the substitute teacher in my classroom. I was not sure how well he or she would interact with the students, how well the students would be on task, or what the level of chemistry understanding the substitute teacher would possess. Still, I did not want my own professional development to come at the expense of my students’ education or the momentum in the unit that we had established.

When faced with this problem, I try to develop a lesson plan that is simple and to the point. Yesterday’s lesson was just that. It was reading from the book and answering questions—about exactly the next topic that we were going to discuss anyway. In a way, it was like assigning pre-reading. This practice is one in which for homework students read up on a topic in order to not be hearing or seeing the material for the first time when it is presented.  

In this case, instead of for homework, students are engaged in an accessible task that they can complete in my absence. Judging from the conversation we had in this lesson, the task was accessible, and there was only a little confusion. Students who did the work received homework credit, while students who did not were reprimanded for irresponsibility. They were notified before my conference of those expectations. Most students met them. 

  Keep the learning moving forward
  High Expectations: Keep the learning moving forward
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Reactivity and the Periodic Table

Unit 4: Compounds
Lesson 1 of 8

Objective: Students will be able to relate the position of an element on the periodic table to its relative reactivity.

Big Idea: Variation in the reactivity of different elements is due to variations in valence shell electron configurations. Group 1 and 2 elements are more reactive than transition metals.

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4 teachers like this lesson
Science, Chemistry, ionic bonds, bond formation, NGSS, periodic table, compound
  60 minutes
exploding cesium in
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