CSTA Classroom Science

Is the NGSS Going to Ruin High School Chemistry?

By Pete A’Hearn and Wanda Battaglia

Pete: Most science teachers I work with are excited about the shift to NGSS and exploring new possibilities for student learning. But, I have heard some grumbling from high school chemistry teachers that NGSS is gutting chemistry. “Why there are no standards for subjects like the Gas Laws, acids and bases, naming of compounds, and solutions that are an important part of chemistry?”

I know that you are a high school chemistry teacher who is working hard on NGSS. How would you respond to these teachers?

Photo by Wanda Battaglia[/caption] 

Wanda: NGSS is asking for a change in the thinking...the NGSS Performance Expectations don’t describe “subjects,” but long-term transfer skills. NGSS is “science for all students.” It represents the basic framework for teachers to design their curriculum. Teachers can add as much as content as they want--but it’s important to change the process by which the students are learning it.

Even though certain content is not explicitly mentioned, that does not mean that it can’t be taught. Gas laws, for example, could be covered within HS-PS1-3, HS-PS1-5, HS-PS1-6, or HS-PS2-6...basically anywhere that molecular interactions would be discussed. Performance expectations can be bundled-- teachers must not think in terms of “those chapters from the book” anymore, but apply more of their own creativity and integrate content to explore phenomena.

An example is a unit I’ve taught on Atomic Structure that bundles Chemistry standards on the structure of the atom, the physics of waves, and their uses in astronomy and medical technology. Resources for the unit can be found at: https://ngsschemistry.wordpress.com/unit-2-atomic-structure/.

Many teachers I know are still covering their “old & comprehensive” content in Honors Chemistry, but redesigning their classes to be more investigative and/or problem-based. In “regular” Chemistry, the focus is more on the practices and crosscutting concepts.

Pete: Yes, it’s important to remember that NGSS is the floor, not the ceiling. It’s focused on the learnings that students will need to solve problems or understand science ideas in the real world, it’s not about marching through the subjects in the book.

But many teachers feel that without doing lots of Chemistry math problems, students will not be prepared for college level work in Chemistry. They feel that to best prepare kids for college, their classes need to look like college. That means lots of lecture, lots of problem sets. One of the things we hear about science and engineering pathways is that many kids who go to college intending to study science and engineering are unprepared for the amount of math and drop out. Won’t downplaying the math make this problem worse?

Photo by Wanda Battaglia[/caption] 

Wanda: Teachers can put as much math into it as they want. The NGSS should not be viewed as restrictive, but flexible. From my perspective, the NGSS has a focus on students understanding relationships between variables, not just learning how to “plug & chug,” which is the traditional way.

For example, I have had Honors Chemistry students who could plug in numbers using the ideal gas equation, but could not explain if their answer made sense. They understood where the numbers go, and how to solve the equation, but could not demonstrate any understanding of how the variables affected each other. Students must investigate to uncover those relationships, so that the math then makes sense.

It is more important that the average student has the necessary thinking skills to tackle problems in general. Students who are college bound, and contemplating a career in a science or technical field, should be taking AP Chemistry to prepare them for college chemistry.

Pete: What is your vision for how a student who goes through high school with NGSS will be prepared for college and career? How will that be different than a student’s experience now?

Wanda: With a cohesive and passionate K-12 implementation of NGSS, I believe that students will exit high school with the ability to be more independent in their thinking and problem solving, while also sustaining more of an inquisitive mindset. This will foster more innovative thinking on the part of our students, which will contribute to success beyond high school in any area of study.



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