There are many types of assessment that our teachers use in regular practice which can be loosely categorized as formal and informal. Formal assessments (or summative assessments) are those that are discrete and planned in advance. These might include standardized tests, end-of-unit tests, or explicitly designed portfolio tasks. Informal assessment (or formative assessments) happens in the classroom every day, as teachers review students’ work, ask questions or observe students in action. Formative assessment is ongoing and informs a teacher’s understanding of student progress; summative assessment is conducted at the end of a unit and measures students’ knowledge and skills against some kind of standardized benchmark; however, in practice, end of unit tests may function formatively and provide teachers with valuable information for future curriculum planning.