Using Thonny in classrooms
Thonny installer doesn't require admin privileges. This is supposed to allow the students to install Thonny also into classroom computers where they have restricted access.
Default installation path is %LOCALAPPDATA%\Programs\Thonny (eg. C:\Users\Aivar\AppData\Local\Programs\Thonny). Depending on the setup of your classroom, it may make sense to install Thonny under %APPDATA% (eg. C:\Users\Aivar\AppData\Roaming\Thonny). If you want to choose a directory outside %USERPROFILE% then you may need to run the installer as administrator.
It is OK to install Thonny into one directory and then copy the installation directory to another place, eg. to a network location. This way you can create a shared installation in the classroom. With this approach you currently need to create the shortcuts by yourself, though.
On first run Thonny creates a user-specific directory for storing configuration and default virtual environment for executing user programs. By default its path is %USERPROFILE%\.thonny (eg. C:\Users\Aivar\.thonny). This may change in future versions (see #279), but you can change it already by running Thonny with environment variable THONNY_USER_DIR pointing to desired location.
One option for specifying THONNY_USER_DIR is to create a bat-file which sets it and then runs Thonny. Since version 2.1.10 you can alternatively create a script named customize.py under thonny package (eg. C:\Users\Aivar\AppData\Local\Programs\Thonny\Lib\site-packages\thonny) which makes desired changes in the environment:
import os os.environ["THONNY_USER_DIR"] = "<path to desired folder>"
If present, this script is run as first step of launching Thonny.
Since version 2.1.10 you can tell Thonny how it should initialize its user directories (THONNY_USER_DIR). For this you should create a directory named user_dir_template under thonny-package (eg. N:\ClassroomNetworkPrograms\Thonny\Lib\site-packages\thonny).
For example, if you want students' programs to use bundled python.exe directly (instead of creating a virtual environment), you should put a configuration.ini under user_dir_template, which looks something like this:
[run] backend_configuration = Python (N:\ClassroomNetworkPrograms\Thonny\python.exe)
Don't forget that you can also use a separate Python installation for the backend:
[run] backend_configuration = Python (C:\Python36\python.exe)