When choosing assessments for your online course, think about assessment and learning as existing on a spectrum. Rather than only thinking about grades, consider assessment as any opportunity where students can demonstrate their learning to you.
The ALT Centre recommends using a mix of low-stakes and high-stakes assessments in your online courses (see definitions below). We can't directly watch students learn like we the face-to-face class. So, unless we actively ask students to demonstrate their learning to us, we may never know they need additional assistance until it's too late.
Low stakes: little risk to students if they 'get it wrong'; low investment of time
High stakes: large impact on students' grade; large investment of time