Have you set your achievable target for tomorrow's practice? This needs to be specific with all the details you require to make it quantifiable.
8 bars of the Brahms piece, hands apart and hands together, with the metronome at crotchet = 40. Fixed dynamics included.
This can be record in different ways,
=> Writing your target in a practice notebook or a blank record book is good as long as you remember to use it on a regular basis.
=> Record or index cards allow different pieces to be grouped together.
=> A much quicker and dependable account is a quick audio or video note on your phone. Record your practice session as a practice diary, you may find that narrating it helps keep focus. This is not to share, or even to watch back, but to give you a record, should you require it, of your progress. If you have time you can look back over your practise and determine where distractions happened, where you were tired or required a drink, or the amount of time you spent checking your phone. At the end of your practice, stop the diary recording and take 5 minutes to record the item you had as your achievable target for this session. Watch it back to observe if you achieved your target.
Post your video and target statement on YouTube as 'unlisted'. This can be shared with your music teacher via a direct link or, when your focus drops, watch each summary and see how far you have come.