Online Teacher PD and Chemistry, Physics, Biology, Math Tutor

07/15/2026

Newton's 3rd law

In this video, I break down Newton’s Third Law using two stacked boxes and real numerical force values instead of just symbols.

We start with the boxes at rest, then extend the problem to include a horizontal force and friction, showing:

How action–reaction force pairs really work

Why forces cancel (and when they don’t)

How to handle internal forces using system diagrams

How friction between objects differs from friction with the ground

This is a common source of confusion in physics — especially when there are no numbers — so we keep everything concrete and visual.

Drop a comment if you want me to clarify any step.

Newton’s 3rd Law Explained with Two Stacked Boxes (With Real Number...

07/08/2026

Slope problems don’t have to be confusing!
Many students get stuck on “rise over run,” sometimes flipping it or getting lost with negative slopes. The trick? focus on units.

In this video, I show how to:
• Use units to figure out slope correctly
• Apply slope to money, burritos, and real-life examples
• Connect slope to velocity (distance/time) problems
• Understand why “rise” can be negative or decreasing

Once you see slope as change in y over change in x with units, it becomes a consistent and intuitive tool for algebra, physics, and everyday problems.

Stop Flipping Rise Over Run in Slope — Use This Unit Trick - Math ...

06/30/2026

Hi, I’m Andrew McLaren! In this video, I’ll show you how to convert between Celsius and Fahrenheit easily and efficiently using a simple trick with multiples of five.

We’ll cover:

The relationship between Celsius and Fahrenheit

How to derive the conversion formulas step by step

Tricks to make mental math easier for temperatures

Real-world examples: room temperature, hot days, and boiling water

By the end of this video, you’ll be able to quickly convert temperatures without relying on a calculator!

Perfect for students, teachers, or anyone who wants a quick math shortcut.

Celsius to Fahrenheit Conversion Made Easy | Quick Math TricksHi,...

06/06/2026

Hi, I’m Andrew McLaren! In this video, we dive into titrating polyprotic acids and bases—those that release multiple H⁺ or OH⁻ ions. Learn how to properly account for multiple ion releases, calculate equivalence points, and handle tricky titration math. We cover examples like H₂SO₄, phosphate, carbonic acid, and calcium hydroxide. Perfect for AP Chemistry students or anyone learning advanced acid-base titrations.

💡 Tip: Focus on canceling H⁺ and OH⁻ moles to find equivalence points accurately!

Titrating Polyprotic Acids & Bases | AP Chemistry Tips - Acid/Base ...

05/14/2026

Hi, I’m Andrew McLaren! In this video, I break down bond energies and why the ΔH formula sometimes looks “backwards.” You’ll learn why bond formation releases energy, how reactants and products affect ΔH, and tips for working with negative and positive values in thermochemistry problems. Perfect for AP Chemistry students or anyone studying reaction enthalpies.

Why Hf Formation Bond Energy Formula is "Backwards" - ChemistryHi, I’m Andrew McLaren! In this video, I break down bond energies and why the ΔH formula somet...

04/27/2026

Break down the most common acid-base questions from the AP Chemistry 2025 exam. Learn how to quickly solve problems involving equivalence points, half-equivalence points, pKa, and titration curves—without getting stuck in long calculations. Perfect for AP Chem students preparing for exams! 💪 🎓

https://youtu.be/YGAzkfRhqtI

02/10/2026

As teachers, we all know the struggle of finding the right file on Google Drive—especially when the title slips your mind. Over the years, I’ve found a system that makes resources easy to find, use, and reuse:
1️⃣ Organize by Units & Folders – Group lessons, activities, and resources under clear unit folders.
2️⃣ Create a Hub Document – For each unit, have a central document linking everything: lesson plans, videos, readings, and standards. This keeps everything in one place and helps you track what’s covered.
3️⃣ Use Color & Chunking – Color-code lessons or topics within a unit to make navigation intuitive and visually clear.
This system saved me hours of searching and made planning for the next year much easier. Even when moving schools, these hub documents kept everything organized and accessible.
💡 Tip: Try Google Takeout when leaving a school—it preserves your organized structure.


https://lnkd.in/gQPKbwFG

01/07/2026

🟢 Struggling with the circle formula? Forget just memorizing it—understand why it works! In this video, I break down the equation step by step using simple examples and show how it’s basically the Pythagorean theorem in action. Learn to plot points, calculate distances, and truly grasp x² + y² = r². Perfect for students who want clarity beyond formulas.

Watch now and see how circles, triangles, and radius all connect in a way that makes sense! 📐✨

Check it out and let’s ace those math concepts together! https://youtu.be/pVvpGA74InY

Domain and Range Made Easy: The Golf Range Analogy - Math Tutorials🏌️‍♂️✨ Mastering Domain and Range with a Golf Analogy! ✨🏌️‍♀️Just dropped a new video wh...

11/11/2025

In this video, I’ll show you how to use AI to generate CER (Claim, Evidence, Reasoning) card sorts for your classroom—and where you’ll need to step in as the teacher:

https://lnkd.in/g7vTMKe4

AI can quickly make cards based on NGSS standards, but it often mixes up evidence and reasoning, or labels the cards in ways I don’t want my students to rely on. I’ll walk you through:
How I asked AI to create a third-grade CER card sort
Why separating evidence (observations) from reasoning (big picture ideas) matters
Common pitfalls when using AI for classroom resources
How to adapt these card sorts for your own grade level or curriculum
This activity works well as a short, one-day exercise to help students practice distinguishing between what we see (evidence) and what we think or conclude (reasoning).
🔗 Here is a ready-to-use packet on Teachers Pay Teachers for those who just need something fast. But you can also customize your own with the steps I show here.
This TPT product: https://lnkd.in/gFxCBeSV

If you want more help with NGSS performance expectations, evidence statements, or building CER routines, check out my other videos linked on the channel.

This link will take you to a page that’s not on LinkedIn

11/08/2025

📄 Video Description:
In this video, Andrew McLaren reviews a tricky friction problem and shows how ChatGPT initially got it wrong — making the same kind of conceptual mistake that many students make when they skip drawing force diagrams.

You’ll see:

Why identifying all forces on an object is essential

How static friction and contact force can act together

The danger of treating one force as the only force

How to verify your results by checking each object separately

Why some mistakes are more concerning to a teacher than others

This is a great example of how human reasoning — and proper problem-solving habits — still outperform “pattern-matching” answers when it comes to physics.

Video Link: https://lnkd.in/gYtBJAiJ