Chemguy vs Bone Zone

The Chemguy App has arrived! I'm Rob Lederer and I taught chemistry for 35 years. I've taught all high school levels of chemistry, including AP Chemistry and IB Chemistry, too! Since 2003, I have been known as Chemguy to the students outside of my classroom. My Chemguy YouTube videos have millions of views. The Chemguy App that I have personally built has distilled my teaching career into a course that completely covers high school chemistry, AP and IB material, and first year university chemistry. Everything is covered: The Periodic Table, Compounds and Reactions, Stoichiometry, Solutions, Gases, Atomic Theory, Chemical Bonding, Molecular Shapes, Energy, Electrochemistry, Chemical Equilibrium, Acids and Bases, Organic Chemistry, Chemical Kinetics, Thermodynamics, and Calculating Uncertainty Values. Phew! This is what you get in the Chemguy App: 1. Over 200 video lessons, where I teach all the chemistry principles, give detailed explanations, and problem-solve through all the calculations in every unit of study. 2. My entire classroom note package. All the material explained, with tables and diagrams and pictures. At the end of each lesson there are practice problems, over 1000 in all, to hone your chemistry skills. 3. Tests! I have made close to 100 interactive quizzes for all the lessons and summary unit exams, too! That's a total of over 1000 questions to practice! 4. Chemguy Messaging. After going through all of the above, is there still something that you need help with? Send me a text in the chat function of the app! Let's talk about it! So, watch the videos, read the notes, do the practice problems, have fun with the quizzes, and cap each unit off with the exam. And if something is bugging you, chemistry-wise, send me a message and let's chat about it! If you want to know more about me, what I've done and what I continue to do, please visit my website, roblederer.ca

Discover the prehistoric world hiding beneath your feet with Bone Zone — interactive geological maps that turn every hike into a journey through deep time. EXPLORE THE GEOLOGY AROUND YOU • Detailed geological maps for all 48 continental states • Formations colored by geologic age using international standard colors • GPS centers the map on your location and your state • Tap any formation to learn what it is, how it formed, and how old it is COULD YOU FIND A FOSSIL HERE? • Every formation gets a plain-language fossil verdict — from "Hot Spot" to "Wrong Rock" — based on its rock type and geological age • See documented fossil finds near the exact spot you tapped, from the Paleobiology Database's scientific records • Fossil pins show real discoveries: species, age, and taxonomy • Browse actual museum specimen photos and records from collections across the country (iDigBio) LEARN AS YOU EXPLORE • Interactive learning center covering rocks, ages, and fossil types • A geological timeline from the first life to the ice ages • Field safety guidelines and collecting ethics • Clear guidance on laws and land access — know before you dig BUILT FOR REAL ADVENTURES • State data downloads on demand and stays on your device • Perfect for rockhounds, students, educators, scout troops, and anyone curious about what's underfoot • Promotes responsible exploration and Leave No Trace principles FREE WITH ADS — REMOVE THEM FOREVER Bone Zone is free to use, supported by small banner ads that never cover the map. An optional one-time purchase removes all ads permanently. No subscriptions, no accounts. From shark teeth on beaches to ancient coral reefs in your local hills, start your journey through deep time today. Privacy: https://bone-zone.app/privacy-policy.html Terms: https://bone-zone.app/terms-of-service.html