A history textbook is an example of

A textbook can either be a secondary or tertiary source and, in seldom cases, a primary source. In most cases, the author of a textbook interprets prescribed theories of a topic and would, therefore, be a secondary source. A textbook can be a tertiary source when it simply indexes information about a particular topic.

Explanation:

chronological thinking is an indispensable tool to structure a historical narrative and to give meaning to a sequence of events. the final section presents the results of a survey to test the chronological thinking of lower secondary school students carried out by the educational research institute.