allperiodictables.com

What It Is

All Periodic Tables is not a typical online course platform, but rather an educational resource site built by Roy Alexander around the periodic law, the periodic table, and the Alexander Arrangement of Elements (AAE). The site highlights “FREE chemistry interactives” and provides 3D chemistry models, hands-on teaching tools, materials on trends in elemental properties, DIY periodic table cards, PowerPoint materials on the history of the periodic table, and related classroom integration lessons.

Core Content and Teaching Approach

Its main feature is explaining the periodic law through 3D models of element arrangement, with particular emphasis on the limitations of the two-dimensional periodic table when it comes to representing all element relationships at once. The site suggests that before teaching the traditional periodic table and elemental trends, students should first understand the evidence for the periodic law through the Chemical Element System or AAE model, and then return to the flat periodic table. Resources include free downloadable materials, rotating demonstration videos, instructions for the DeskTopper personal model, classroom-sized 3D models, and historical materials, making it suitable for teachers as a supplement for inquiry-based or visual classroom instruction.

Pricing and Certificates

The main text clearly mentions free interactive resources and free downloadable materials, but it does not disclose whether the DeskTopper or larger models are paid, how much they cost, or what payment methods are available. The site does not display any accreditation, completion certificates, credits, or formal training credentials, so it should not be viewed as a certificate-based course.

Pros and Cons

The advantages are its focused topic, free resources, and emphasis on hands-on learning and spatial visualization, which can be valuable for understanding the periodic law, elemental continuity, and property trends. It also covers activity materials for multiple grade levels, allowing teachers to integrate them flexibly into the classroom. The drawbacks are that the page was last updated in 2019, so the information is somewhat outdated; the site structure feels more like a personal project and lacks a clear course pathway, learning objectives, lesson schedule, practice assessments, and learning support. Some resources require clicking through or requesting by email, so convenience and long-term maintenance are uncertain.

Who It’s For

It is better suited to secondary school chemistry teachers, science educators, and students who want to understand the periodic table through models. It is less suitable for users who want to study a complete chemistry course systematically, earn a certificate, or prepare for exams.

Access in China

The scraped text does not provide information on accessibility, so it is not possible to determine whether the site can be accessed directly from mainland China. It is recommended to test the website and download links in practice.