Creating a plan or schedule means organising tasks in a clear order, allocating time for each task and checking that everything fits within the available time. In maths, this often involves working with time, dates, durations and constraints such as deadlines, opening times or travel times.

A good schedule starts by identifying what needs to be done and how long each part is likely to take. If the times are not exact, allow extra time for delays, breaks and switching between tasks.

When working with time, it helps to write times using the \( 24 \) hour clock to avoid confusion. You can find the duration of an activity by subtracting the start time from the end time, using minutes and hours carefully.

For example, if a study session starts at \( 17{:}35 \) and finishes at \( 19{:}10 \), the time spent is:

$$
19{:}10 - 17{:}35 = 1{:}35
$$

This means the session lasts 1 hour and 35 minutes.

Schedules often involve more than one activity, so you need to add durations and check for overlaps. Suppose you plan to revise for \( 45 \) minutes, take a \( 10 \) minute break and then do practice questions for \( 50 \) minutes. The total time needed is:

$$
45 + 10 + 50 = 105
$$

$$
105 = 1{:}45
$$

So you need 1 hour and 45 minutes in total.

When a plan includes a fixed deadline, work backwards from the finish time to find the latest start time. For example, if you must finish by \( 20{:}30 \) and the work takes \( 1{:}45 \), the latest start time is:

$$
20{:}30 - 1{:}45 = 18{:}45
$$

Always check that your schedule is realistic. A plan is only useful if the times make sense, the order is logical and there is enough time to complete each task.