For the first day of school, 9th graders in honors math worked on these problems in groups to practice discussing, asking questions, and trying out problem solving strategies. #iteachmath docs.google.com/document/d/1...

In #mathstoday we had fun playing a modified version of "Statement Snap" from NRICH (nrich.maths.org/problems/sta...) with incoming 9th graders to review vocabulary. #iteachmath

Using clinometers and #trigonometry to help calculate the height of a tree; then using the height and the trunk circumference to estimate the amount of carbon stored in the tree. #iteachmath

Writing the new coordinates of a point rotated around a circle #iteachmath #geometry

In #mathstoday we are continuing to review special right triangles and trigonometry #geometry #iteachmath

In #mathstoday we are reviewing ideas related to 30-60-90 triangles and trigonometry #iteachmath #geometry

In #mathstoday we are reviewing some integration techniques #calculus #iteachmath

Central angles of regular polygons #iteachmath #geometry

In #mathstoday we are using special right triangles to help find exact values for sin 15 and cos 15 without a calculator #geometry #iteachmath

In #mathstoday 9th graders are deriving the formula for the Lateral Surface Area (LSA) of a cone #geometry #iteachmath

Area of a trapezoid formula and similar triangles #geometry #iteachmath

Alphabet relay in #geometry to brainstorm topics related to the final exam next month #iteachmath #mathstoday

Clock angles problem (based on www.reddit.com/r/mathpuzzle...) #geometry #iteachmath

#geometry game: "Estimating angles" from NRICH #iteachmath nrich.maths.org/estimatingan...

#numbers #geography #flags #birthdays

#geometry game: "Square It" from NRICH - First player to form the vertices of a square wins #iteachmath nrich.maths.org/squareitnew/...

Demonstration of Triangle Sum #iteachmath #geometry

Diagrams for 2D #geometry topics #iteachmath docs.google.com/document/d/1...

Definite and Indefinite integral dominoes from math.colorado.edu/activecalc1/... #calculus #iteachmath

In #mathstoday we are looking at calculating volumes by cross-section #iteachmath #calculus

In #mathstoday 9th graders are reviewing ideas about transformations of f(x) such as f(x-2) and f(x/3) #iteachmath

In #mathstoday, we are discussing u-sub vs guess and check when evaluating integrals #calculus #iteachmath

in #mathstoday looking at a visual* for the line and parabola through the point (0, 1) that best fit the graph of y = cos x #iteachmath

In #mathstoday learning about integration by parts #calculus #iteachmath

In #mathstoday, ninth graders are using the "socks and shoes" method to find the equations of inverse functions #iteachmath

In #Mathstoday, to apply their knowledge about perpendicular bisectors and angle bisectors of a triangle, students are using #Desmos to make a graph of a triangle, its circumcircle, and its incircle. #iteachmath #geometry

Today in #calculus learning about the Fundamental Theorem of Calculus Part 2 (taking the derivative of the integral of a function) shorturl.at/gD1VW. #iteachmath #mathstoday

FTC Part 2

FTC Part 2 Last class, we learned about the Fundamental Theorem of Calculus Part 1: Today, we will learn about Part 2. Given the graph of f(t), explain why it makes sense that A(0) = 9π/4 Giv...

shorturl.at

So #MathsToday I found out that if you have four adjacent Fibonacci numbers e,f,g,h then eh and 2fg are two elements of a Pythagorean triple. 1,1,2,3 - 3 and 4 1,2,3,5 - 5 and 12 2,3,5,8 - 16 and 30

precalc! freely available materials! great combination cc #iTeachMath ♾️

Drew Lewis@drew-lewis.com · last yr.

We have just published the 2025 edition of the Team-Based Inquiry Learning (TBIL) Resource Library. This includes activity books and exercise banks for Precalculus (new!), Calculus (1 & 2), and Linear Algebra. tbil.org/library/

Back on Twitter, my most viewed tweet was a link to my "math pep talk"—a video I made for my students that now has 23K views 👀 m.youtube.com/watch?v=kenf... There's a lot to expand on in that video, like structural barriers to success in math. But I'm sharing it again anyway. #MTBoS

So, you think you're bad at math...

YouTube video by Courtney Gibbons

m.youtube.com