The Mahara e-Portfolio does not have any structured assessment built in, but it can be connected to Moodle for assessment purposes using a Moodle plugin. This plugin was originally written for the Moodle 1.9 "assignment" activity (mod/assignment). In Moodle 2.3 the old mod/assignment module was deprecated and a new incompatible mod/assign module replaced it. Two separate universities made their own ports of the Mahara assignment plugin to mod/assign, and now I've merged these forks together into one version that uses the best parts of each and adds a few new features as well.
This talk was originally given at Moodle Moot NZ 2014 in Nelson, New Zealand. It includes a general introduction to Mahara aimed at an audience of Moodle users.