The amount and type of informal assessment we do depend on a number of things:
- The size of of the class.
- The age of the learners (informal assessment is especially useful for young learners for whom formal test tasks are often too abstract).
- The language knowledge, behaviours or skills we want to assess.
- The frequency of formal test or examinations.
To carry out informal assessment of productive skills in larger classess, we probably need to assess small numbers of learners in different lessons.
We can assess learners´grammatical and lexical knowledge informally by using language games or quizzes, or by monitoring practice activities and making a note of frequent errors.
Reference:
Spratt, M., Pulverness, A., & Williams, M. (2012). The TKT Course Modules 1,2 and 3 (2nd ed.). New York: Cambridge University Press.