What a trainer can actually review
A trainer reviewing your log between sessions has minutes, not an evening, and a specific job: decide what to build on, what to repair, and what to set next. Logs fail that job in two opposite ways. The diary version buries the training inside stories about the park, the weather, and your feelings, so the trainer hunts for the facts. The tick-box version records that practice happened and nothing about how it went, so the trainer learns nothing the attendance sheet did not already say.
The workable middle is a short, structured entry written the same day, in the same three parts every time, honest about failures. Trainers trust logs that record the bad repetitions, and they plan better sessions from them.
The three-part entry: before, during, after
Open each entry with what happened that the training is responding to, in a line or two: the lunging episode at the corner shop, the recall that failed at the beach, the visitor greeted too wildly. This context tells the trainer which real-life problem the practice was aimed at, and over weeks it shows whether the problem itself is shrinking, which is the point of all of it.
The middle part records the practice: exercises by name, where you worked, what distractions were present, and how the dog actually performed, including where it fell apart and what you changed in the moment. "Loose-lead work on the quiet street, held focus past two parked cars, lost it at the third when a cat crossed, shortened the distance and recovered" is an entry a trainer can use. "Lead work went well" is not.
Close with the homework exactly as agreed: the exercise, the setting, how many repetitions or minutes, and the criterion for making it harder. Specific homework gets done and can be reported against; "practice recall more" quietly evaporates by Wednesday.
Homework written so it gets done
Write homework at the session, not from memory in the car. If the trainer's instruction was verbal, repeat your written version back before you leave, because the most common log problem is homework faithfully done that was never actually set. Note any equipment the homework assumes and any safety condition attached to it, such as working on a long line, keeping distance from the trigger, or stopping if the dog goes over threshold.
Between sessions, tick off homework as you do it and jot the one-line outcome beside each item. Arriving with homework visibly done, partly done, or honestly skipped, each with its reason, lets the trainer adjust the plan to your real life instead of an imagined one, and that adjustment is much of what you are paying for.
Bringing the log to the next session
Bring the run of entries since the last session, not just the latest page. Progress in training is rarely linear, and the pattern across six entries, good days clustering around quieter venues, setbacks clustering around tired evenings, is where the next decision lives. If you change trainers, move house, or are referred onward, the log becomes the handover document that prevents starting again from zero.
Filing the training log in your KinsLe Pet Passport alongside health and vaccination records gives any professional meeting your dog the combined picture, because behavior history and health history so often explain each other.