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Description
Friendly Chemistry Teacher Edition Vol 1Friendly Chemistry is a truly unique approach to teaching introductory chemistry. Used by home schoolers and charter, public and private school students world wide for over ten years, Friendly Chemistry presents what is often considered an intimidating subject as a genuinely fun, enjoyable experience. Whether you're a high school aged student needing a lab science course or a "non traditional" student looking for a refresher course to help you prepare
Friendly Chemistry is a truly unique approach to teaching introductory chemistry. Used by home schoolers and charter, public and private school students world-wide for over ten years, Friendly Chemistry presents what is often considered an intimidating subject as a genuinely fun, enjoyable experience. Whether you're a high-school aged student needing a lab science course or a "non-traditional" student looking for a refresher course to help you prepare for an upcoming entrance exam, Friendly Chemistry can help you accomplish your goal in a "painless" way! If you do have aspirations of a future in a science field, Friendly Chemistry can give you the solid foundation you need to succeed in subsequent courses. Friendly Chemistry was written using simple language and a host of analogies to make learning (and teaching!) chemistry easy. The chemistry concepts presented in Friendly Chemistry are NOT watered-down. The concepts are just explained in ways that are readily understood by most learners. Coupled with these explanations is a host of teaching aids, labs and games which makes the learning concrete and multi-sensory. Students find the course fun and painless. Parents often comment, "I wish I had had this when I was taking chemistry. Now it all makes so much sense!" Friendly Chemistry covers the same topics taught in traditional high school chemistry courses. The course begins with an introduction to atomic theory followed by discussion of why the elements are arranged the way they are in the periodic table. Quantum mechanics comes next using the acclaimed "Doo-wop" Board as a teaching aid. Next comes a discussion of how atoms become charged (ionization), followed by an explanation of how charged atoms make compounds. The mole is introduced next, followed by a discussion of chemical reactions. Stoichiometry (predicting amounts of product produced from a reaction) is treated next followed by a discussion of solutions (molarity). The course is wrapped up with a discussion of the ideal gas laws. Please note that this is Volume 1 of the Teacher's Edition. Volume 2 of the Teacher's Edition, the Student Edition and the Manipulative Set must be purchased separately to have all necessary materials to complete this course.Shipping Notes
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4.5 ★★★★★
Based on 9 reviews
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Product Reviews
★★★★★ 5
Nice bundle and great customer service
Size: Saros 10R/Qrevo CurvX/Edge 2 Accessories
I purchased this as an economical bundle for my Roborock Qrevo Curv. All of the parts seem to work and fit properly, which is good since I have actually had problems with the main brushes from a different maker. The only issue I ran into was that the Roborock website seemed to indicate that all of the Qrevo Curv models use the same filter size. Apparently the CurvX/Curv 2 Pro use a different filter. When I asked VIEWALL about it through Amazon messaging, they were kind enough to let me know about the difference and even offered to send me filters for my model. So you can count on excellent customer service from the company.
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Reviewed in the United States on January 7, 2026
★★★★★ 4
Affordable Roborock Qrevo CurvX Accessories That Fit Well
Size: Saros 10R/Qrevo CurvX/Edge 2 Accessories, Size: Saros 10R/Qrevo CurvX/Edge 2 Accessories
I have a Roborock Qrevo CurvX vacuum cleaner, so when I saw this replacement parts pack, I wanted to give it a try.
The box contained everything needed to carry out the maintenance schedule recommended in the Roborock app. It even included a small screwdriver, which made changing the side brush easy — a thoughtful extra touch.
I compared all of the replacement parts to the original ones and didn’t notice any major differences. Overall, the parts do seem slightly lower in quality than the originals, but not to the extent that I think it will significantly affect performance or durability.
I replaced the side brush without any issues, and it fit properly.
The mop pads were softer and fluffier than the originals and didn’t fit quite as snugly, although I don’t think this will have much impact on cleaning performance.
The new filter installed perfectly, and the vacuum bags also fit as expected.
Overall, I’m happy with this product. It’s reasonably priced and represents good value for money. I can see myself continuing to use these replacement parts in the future. I’m taking one star off due to the parts being of slightly lower quality
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Reviewed in the United States on May 13, 2026
★★★★★ 5
Value replacements
Size: Saros 10R/Qrevo CurvX/Edge 2 Accessories
As far as I can tell these are pretty solid replacements for the SAROS 10R. My original side brush was all torn up after just a few months of use so I found these replacement parts. Haven’t used the mop pads yet, but they are a similar design to the “upgraded” mop pads offered by Roborock which are superior to the standard one IMO. Everything else seems to be equal quality to the OEM parts, and at less than $12 I have no complaints on this kit.
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Reviewed in the United States on December 31, 2025
★★★★★ 1
Does not work for Qrevo Arc.
Size: Saros 10R/Qrevo CurvX/Edge 2 Accessories, Size: Saros 10R/Qrevo CurvX/Edge 2 Accessories
Filter does not fit my Qrevo Arc. Photo shows size comparison between my old (very dirty) filter and the replacement filter.
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Reviewed in the United States on April 6, 2026
★★★★★ 4
Solid replacement parts kit — just skip the mop pads
Size: Saros 10R/Qrevo CurvX/Edge 2 Accessories, Size: Saros 10R/Qrevo CurvX/Edge 2 Accessories
This kit has been a handy all-in-one refresh for my robot vacuum. The main brush, side brushes, filters, and dust bags all fit correctly on my Qrevo, slid in without fuss, and have been performing on par with the originals — suction feels unchanged, the side brushes kick debris toward the intake properly, and the filters look and seat identically to the ones they replaced. My one real complaint is the mop pads. They're noticeably thinner and flimsier than the OEM pads, don't hold water as well during a run, and left streakier lines on my floors compared to what I'm used to. I've ended up going back to the original-brand mop cloths and just using this kit for the dry-cleaning parts, which have genuinely been a good value. Four stars — great kit minus the mops.
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Reviewed in the United States on April 15, 2026