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STEM Articles

Lectures in STEM

Crosscutting Concepts has developed a lecture series for each module in Desolation: STEM. A free preview of each module's lecture is below in PDF format. To access the full version PowerPoint formats of the lectures, please access via the teacher download portal.

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An Introduction to Numerical Methods


Analytical solutions are the only methods taught to solve math problems until students take upper-level calculus classes.  A simple example of an analytical solution is the equation for a line: y=mx+b.  You can see that in an analytical solution, all variables of the system are accounted for at the same time which leads to large and complex equations.

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Ups and Downs of the pH Scale

Studying the pH of solutions is a basic skill to help understand the behavior of chemicals, but sometimes it is not very well explained.

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