• Think of who will conduct the
  assessment. Note that the assessment does not need to be conducted by you, as it could be a self assessment or peer assessment.
• Think of how you can assess the
  learners while they are busy with an activity in a way that helps them to improve their work (formative assessment).
• Think of the outcome(s) you wish your learners to achieve, and then devise a rubric that allows the assessor to measure how well the outcome has been achieved.

Assessment and Monitoring
Traditionally, a project or assignment is only assessed when it is finished. The assessment is done by the educator, and each individual is assessed individually. In PBL, assessment is seen differently. It is seen as an important way of monitoring how the group is progressing, and how each individual within the group is contributing. The assessments are formative – that is, they are done so as to help the groups and the individuals in the groups do their projects better. It is aimed at helping them correct mistakes early on. In accordance with OBE, assessments look at how well learners have performed a specific task. The criteria are spelled out in a rubric, a document that specifies what a learner or group needs to do.