STACK is an assessment system for mathematics, science and related disciplines.
STACK was created by Chris Sangwin of the University of Edinburgh, and includes the work of many other contributors. A demonstration server is available in Edinburgh: https://stack.maths.ed.ac.uk/demo.
STACK is based on continuing research and use at the University of Edinburgh, the Open University, Aalto, Loughborough University, the University of Birmingham and others.
STACK 4.2 contains some important new features, a number of interface improvements and bug fixes.
Note: please read the release notes before upgrading from STACK 3.X to STACK 4.X. STACK 4.0 represents a major release of STACK and is a non-reversible change, with important differences which break back-compatibility. Especially, note the conversion of old materials.
Please continue to report any bugs you find at https://github.com/maths/moodle-qtype_stack/issues.
The current state of development is explained more fully in the developer documentation.
The documentation is here, including the installation instructions.
Stack is Licensed under the GNU General Public, License Version 3.