Moodle is an open-source learning management system (LMS). It is written in PHP and distributed under the GNU General Public License. The acronym Moodle officially stands for modular object-oriented dynamic learning environment. In PACE, it is a tool used to contain online courses and foster collaboration amongst students.
The learning management system used in PACE is located here: https://lifechanges.solutions/moodle
For more information on Moodle, visit their website at https://moodle.org