Tim Brzezinski

Welcome to v 5.0 of the BTC auto-grading rubric: OLD BUGS ARE GONE & lots of slick new features have been added! Shout out & T/Y to @mccainm's for her creative genius re: making this possible. More: youtu.be/_KPXVp7fp-k. @pgliljedahl @BTCthinks #MTBoS #ITeachMath #btcthinks

Vertical angles theorem. @GraspableMath whiteboard link - see description in youtube.com/shorts/002P5H_… #MTBoS #ITeachMath

.@GraspableMath whiteboard: Supplementary angles resource. Link in description here: youtube.com/shorts/QsUIwua… #MTBoS #ITeachMath

Super simple, real-life example that shows how 2^0 =1. youtube.com/shorts/uFgnkkT…

Quick scaffolded support for students who need it: @GraspableMath whiteboard - here with finding distance in the coordinate plane. Link in description here: youtube.com/shorts/TN-8nwt… #MTBoS #ITeachMath

Math Ts: @GraspableMath whiteboard helps students with procedural fluency big time — without doing the thinking for them. Link in description here: youtube.com/shorts/SrI24LU… #MTBoS #ITeachMath #mathteacher

Math Teachers: @GraspableMath whiteboard is a powerful tool to help students work with arithmetic & algebraic expressions. Shown here with rationalizing denominators. Link in description here: youtube.com/shorts/YMvlN_d… #MTBoS #ITeachMath

Using simple 5th-grade logic to explain why e^(ln(x)) = x. youtube.com/shorts/xBKn568… #mathematics #mathteacher #MTBoS #ITeachMath

Isosceles triangle surprise 👀 youtube.com/shorts/9KIQ0fZ…

Making sense of distributing a negative coefficient: youtube.com/shorts/-0_udG8… #MTBoS #ITeachMath

[New Post] Ontario Math Links - My favourite #math related links from this week: ontariomath.blogspot.com/2026/01/math-l… links and help from @TimBrzezinski @howie_hua and more #MathChat #MTBoS #iTeachMath

Circle, diameter, tangent, secant, & chord surprise 👀 youtube.com/shorts/FDS-csT… & geogebra.org/m/a4W7Szmx @geogebra #MTBoS #ITeachMath

Cylinder surface area. If seeing is believing 👀 Links: geogebra.org/m/rCxXxFhE & an Open Middle exercise: geogebra.org/m/wkcgyxex & youtube.com/shorts/hX5Oe7y… @geogebra #MTBoS #ITeachMath

Making sense with adding expressions in #algebra. Shown here in @GraspableMath’s whiteboard: activities.graspablemath.com/whiteboards/new & youtube.com/shorts/3S3P6mx… #mathteacher #MTBoS #ITeachMath

No tech. Just paper. Pure simplicity. Here, an effective means for students to explore any polygon’s exterior angles. #mathematics #geometry

Teachers - @GraspableMath whiteboard is an awesome, slick, easy-to-use interface to help support procedural fluency: activities.graspablemath.com/whiteboards/new & youtube.com/shorts/TwegFJy… #MTBoS #ITeachMath

Using tech to explore a special right triangle in a thinking classroom: geogebra.org/m/uvuxbqc6 & youtube.com/shorts/IQLC7s3… @BTCthinks @pgliljedahl #MTBoS #iteachmath

Making sense of radians. And π 🥧 youtube.com/shorts/8_9BW9H… & resources for teachers and students: drive.google.com/file/d/1YJJB5g… @geogebra #MTBoS #ITeachMath

Circle to triangle: What are the angles? 🤔 #mathematics" target="_blank" rel="nofollow noopener">youtube.com/shorts/NUqQu7g… #math #maths #geometry #STEM #STEAM #mathfun #mathteacher #MTBoS #ITeachMath

Right triangle angle trisector surprise! 👀 youtube.com/shorts/QxKNxf0… #MTBoS #ITeachMath

Reflecting across 2 parallel lines is equivalent to a single translation by vector. Quick student exploration: geogebra.org/m/ta5npwq5 & youtube.com/shorts/nB35YQ-… @geogebra #MTBoS #ITeachMath