To help teachers choose appropriate lessons for their students, each exercise is rated by difficulty on a scale of 1-5. The rating is indicated by the numer of devil's heads above the exercise's subject line.
- A rating of 1 might indicate, for example, an English cognates exercise which presupposes no grammatical knowledge of Latin.
- A rating of 2 indicates an exercise which requires some morphological knowledge, but no knowledge of syntax. This might be, for example, an exercise which requires the student to transform words in the accusative case into the ablative.
- A rating of 3 indicates that the student is expected to combine morphological and syntactic knowledge with some ease. This category will include paratactic reading passages where the student is asked to read the passage and then match words from the reading with identifications (in English) of their grammatical forms.
- A rating of 4 indicates that students will demonstrate knowledge of a more advanced grammatical topic like the subjunctives and gerunds mentioned above.
- A rating of 5 indicates a complex reading passage (for example, a passage constructed with several subordinate clauses) with questions requiring the student to understand the form and function of words in the passage.
Ratings have currently been applied to 100% of the exercises, with about 30% of these posted to the site.