I presented my talk at The Ontario Colleges Mathematics Association 39th Annual Conference, on May 23rd. The talk can be found here: I shared what I did in my Linear Algebra class: using GeoGebra to explain and visualize a few core math concepts including linear systems, complex numbers, and eigenvalue/eigenvectors. The audience worked together and […]

# Author Archives: Xinli Wang

## [2019SMAT102] Videos for AM-GM inequality, inequality and set related proofs

I made several videos explaining a few topics that we cover in this course. Some of them came up during my office hours. If you’d like me to explain a certain concept/question covered in our course, feel free to drop me an email and you might see it here ðŸ™‚ AM-GM inequality: the statement, how […]

## [BAB210] Business Statistics

I’m teaching this course during the summer semester at Seneca College. The course outline can be found here: https://apps.senecacollege.ca/ssos/findOutline.do?subjectCode=BAB210 We are into our second half of the semester now and being able to use Excel is an important part for the successful completion of it. I made several short videos explaining how to use certain […]

## [2019SMAT102] A letter to my students

Dear all, Welcome to the Introduction of Mathematics Proof! We want your experience this semester to be successful and rewarding. Math 102 is a challenging course that demands consistent hard work throughout the semester. Here are some tips for you to succeed in this course and some common mistakes you want to avoid. â€¢ Expecting […]

## MAT223 Linear Algebra Exam Review questions answered in videos

Dear students from MAT223: I’ve received some requests to explain the following questions and I made a few short videos to explain how to solve them. Happy learning! If and are linear transformations , and are three distinct vectors in so that then for all 2. If A is matrix and dim(null(A-I))=3, then A is […]

## Are you living vicariously?

First I have to thank one of my favorite podcasts: Hidden Brain for motivating me to write about this post today. They recently published an episode titled “Close enough: the lure of living through others ” and it resonates so much with me. Do you ever find yourself going through video after video about a […]

## Reflection of using Geo-Gebra app in Linear Algebra course

Last semester I had the chance to explore how would using Geo-Gebra in my Linear Algebra course affect student’s learning experience. My initial goal was to find out whether using it would improve student’s engagement in the class. I had taught this course for a few times by then, and one observation I made was […]

## My Acrylic Paintings

Credit goes to the wonderful Angela Anderson . I have been following her amazing YouTube channel and weekly lessons and learned how to paint since two years ago. She’s a role model for me on my OER journey. She’s so generous of sharing her talent in painting and teaching and has reached such a wide community. […]

## 2019 Winter MAT102: Intro to Math Proof

The main topics that we cover in this course are: Numbers, and Inequalities. Sets, functions and fields. Informal logic. Mathematical Induction. Bijections and cardinality. Integers and divisibility. Relations. The course note is available:Â MAT102 The slides for weekly lectures can be found here: MAT102_Week1-2 MAT102_Week2-3 MAT102_Week 4-5 MAT102_Week 6 MAT102_Week 7 MAT102_Week 8 MAT102_Week 9 MAT102_Week10 […]

## CV, Teaching dossier and more

Here’s a copy of my recent CV Here’s a copy of my teaching dossier Here are a few gems I collected during my journey as a math teacher: letter1, letter2, letter3, letter4, letter5 If you are interested in reading the full version of my recent teaching evaluations, they are here: MAT202 Discrete Mathematics (2020 Spring) […]