Final answer:
The question involves applying the old-before-new principle in English composition to improve sentence clarity and cohesion. By mentioning familiar information first, the revised sentence becomes more logically structured and easier to follow.
Step-by-step explanation:
The student's question involves the application of the old-before-new information structure, which is a principle in English composition aimed at improving clarity and cohesion. In the example provided, the old-before-new principle suggests that you should present familiar, or previously mentioned information (old information) before introducing new information or concepts. Applying this principle to the provided sentences can make them more cohesive.
Here's a revised version of the sentence following the old-before-new principle:
'The teacher gave students a class planner yesterday, which described all assignments in detail, as well as the content for each test. However, the planner lacked dates for turning in papers and for taking exams.'