In this lesson students have the opportunity to explore the characteristics of substances ionic and covalent bonds through eight different stations. In particular they learn about conductivity, crystal structure, ease of burning, components, brittleness, energy of bond formation, melting points, and electronegativity differences between these two types of substances.
Within this lesson there are many resources needed for the lab. This is a list of supplies for each station:
To engage students in the lesson I begin by passing out the Lab Paper and read through the objective and procedures with students.
After reviewing the general objective and procedures for the lab I explain to students that they will be writing a claim and evidence for the claim at each station.
Once I have gone over the general idea of the lab I take a few minutes and just quickly talk about each of the 8 stations.
Finally I split students into cooperative groups by passing out cards. I tell students that they should be rotating roles at each station. For more information about my cooperative groups see my reflection from unit 1.
In this portion of the lesson students actually do the lab on the Lab Paper.
These are pictures from each station showing what they look like:
Because I did this lab on a short day I only had about 40 minutes for students to do the lab. Therefore I gave them 4 minutes per station which I timed using my Timer Tools countdown timer. To see how I use Timer Tools see this reflection from unit 1.
For the first set of stations I give students an extra minute so that I have time to go through and talk with each group to ensure that they are coming up with a claim concerning their station and evidence to support the claim. I also make sure that their claim has to do with ionic vs. covalent compounds.
Also, as students are working I continuously ask them:
As students are completing the lab I have them start the conclusion and complete for homework.
When students complete their labs I have them turn their labs in and grade using a rubric.
The rubric ensures that they are writing down observations, claim, and evidence for each station. Additionally, it gives them points for their conclusion.
Here is an example of a graded lab with the rubric.