Here is a quick overview of the principal exercise types and their main characteristics. Each of these principal types has a large number of variants and 'flavours'.

• Gap option exercises
  The exercise contains a number of gaps. In the initial (not done) state the gaps usually display placeholders. Each gap has a number of options. Click on the gap to cycle through the options to find the correct one.
• Category marker exercises
  The exercise contains a number of gaps and a 'legend', a table of colors with their corresponding meanings. In the initial (not done) state the gaps are colored in a neutral placeholder colour. Assign the correct colour to the gaps.
• Multiple choice exercises
  The exercise presents one or more questions ofr statements together with associated options. Choose the correct option(s). Your choice may be restricted to a single option or allowed to be of any number of options.
• Gapfill exercises
  The exercise contains a number of gaps and a table of items that can be put in the gaps. In the initial (not done) state the gaps usually contain placeholders. Put the items in the correct gaps. Items and gaps can be in the ratio 1:1 or 1:many.
• Type-in exercises
  The exercise contains a number of gaps. In the initial (not done) state the gaps display placeholders. The learner has to type in an appropriate response.
• Annotated text
  This exercise type is not evaluated. It is designed to help learners read 'information-rich' texts effectively. The exercise contains a number of gaps. Clicking on the gaps displays an associated annotation.