Substitution and Elimination
Resources for those of us teaching students how to solve systems of equations with substitution or elimination. Continue reading Substitution and Elimination
Tag: Algebra
Beyond Math Conference 2021
Thank you to everyone who joined me at the Beyond Math Conference this summer. I hope you enjoyed my presentation on Getting the Most out of Math Tasks. As promised, here are some additional resources to accompany that presentation. Staircase Task During the video I did three tasks. First, I did a classic task called … Continue reading Beyond Math Conference 2021
Percentages and Milk
Reduced Fat Milk and Milkfat Here’s an activity that my friend Nic Vitale and I wrote for MTMS‘ Math for Real and then found out that they had published something similar (Bu & Marjanovich, 2017) so they decided not to publish our article. It’s funny that Nic contacted me about this situation and we wrote it … Continue reading Percentages and Milk
Points and Lines
Here’s a math problem I thought of when I was driving today involving points and lines. Continue reading Points and Lines
Solve for y and substitute?
Something I’ve been thinking about is the way we teach students to solve systems of linear equations using substitution. Consider for example the following system of linear equations: y = 3x + 4 and 2y – 3x = 16. Many textbooks would suggest the way forward is to solve one of the equations for a … Continue reading Solve for y and substitute?
Why does elimination work?
Teachers typically emphasize two techniques (though there are certainly others) for solving systems of equations: substitution and elimination. The other day I asked my class of prospective middle and secondary teachers to explain why elimination works. I asked this because as I was sitting at my kitchen table that morning, My students were not able … Continue reading Why does elimination work?