"Extension questions" refers to additional questions that go beyond basic information, asking for more detail, explanations, or examples. These questions help to gather a deeper understanding of a topic or prompt further discussion. Full definition
Nice extension questions for rectangle area, with a different spin leaning towards the new style GCSE questions. (tes.com)
There is then also a worksheet for children to work through / research followed by extension questions on the slides. (tes.com)
Set of extension questions requiring students to combine their knowledge of mixed number to / from improper fraction conversions with solving equations. (tes.com)