Design a task which will give students the opportunity to demonstrate their learning. Plan what students will do, how you will collect the submissions, and how assessors will give marks and feedback. Familiarity with the available technologies helps to expand the possibilities at this stage.
Compare and choose technologies
For open ended work e.g. essays, compare platforms at UCL and author the assessment criteria.
For tests, familiarise yourself with the Quiz question types, then author the questions and feedback.
For multimodal assessment consider MyPortfolio as a site for the work; Moodle Assignment is a good place to collect links to the work, and give feedback and marks.