Since a new school year is coming up, I thought I'd introduce myself and share what to expect on my page (including how to pronounce my name)

Teaching tip: Several years ago, I've retired the question "Do you have any questions?" and replaced it with "Ask me at least 2 questions" to help normalize questions in the classroom.

It's Mental Math Monday with guest Tim Brzezinski! Tim wants to know how you would mentally calculate 30% of 990. Please share how you would do it in the comments.

Nobody will remember: - your salary - how "busy you were" - how many hours you worked People WILL remember: - the quadratic formula

First day of school and continuing the tradition of students taking a picture with this "I am a math person" frame. I learned from Atomic Habits that we should START with identity and then processes and outcomes come afterwards.

Today's win: A student said they liked how I teach math, just 20 minutes into our first math lesson.

Here's the first math task in one of my courses. What are 3 patterns you notice? Where is 1,000 in this grid?

Rifle or sabre?

Teacher: We only need 38 digits of pi to compute the circumference of a circle encompassing the known Universe with an accuracy to within the radius of a hydrogen atom. The rest of the digits of pi:

It's Mental Math Monday! Math educators Dana and Kyle want to know how you would mentally calculate 427+385. Please share how you would do it in the comments.

A math infomercial on the divisibility rule of 3 and why it works

4 results in math that make sense due to patterns

Did you know you can subtract left to right?!

At the beginning of the math course, I show this meme and ask students "Where are you in this picture?

The locker problem: 1000 lockers and 1000 students. Student 1 opens every locker. Student 2 closes every other locker. Student 3 changes every 3rd locker (closed -> open, open -> closed), etc. Which lockers are open at the end of this scenario?

My goal for those that don't like math yet:

It's Mental Math Monday! What goes on in your head when you're mentally calculating 85+48?

We don't always have to rely on the standard algorithm when subtracting. Here are two ways we can think about subtraction:

Here's a neat way of multiplying by 5:

How to count in base 2 on your fingers: