Microsoft Visual Studio might be a bit more popular than kod.so. We know about 1 link to it since March 2021 and only 1 link to kod.so. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
Perhaps https://kod.so is more your cup of tea then. Source: almost 2 years ago
While the editor seems to old fashioned there isn't anything particularly wrong in using it for learning. Alternatively you can propose to your teacher about https://visualstudio.microsoft.com/vs/express/ . IMO editor is not a big factor when we are talking about high school learning. Source: about 3 years ago
Codespace - A beautiful cross-platform code snippet manager
IntelliJ IDEA - Capable and Ergonomic IDE for JVM
Ray.so - Create beautiful images of your code
Xcode - Xcode is Apple’s powerful integrated development environment for creating great apps for Mac, iPhone, and iPad. Xcode 4 includes the Xcode IDE, instruments, iOS Simulator, and the latest Mac OS X and iOS SDKs.
Carbon - Create and share beautiful images of your source code.
Visual Studio Code - Build and debug modern web and cloud applications, by Microsoft