To print the practise chart, click on the title to download a pdf. It will print well on legal size paper (8.5" x 14")
At the top right of each day, write the date. Put a sticker on the date as soon as the practice session is finished. Be sure, however, that it is a productive practice session: not just “play”. Sometimes a “reward” for 20 or 30 days of practice in a row adds extra incentive. The visual record (stars, hearts, etc., can be bought at most stationery shops at very reasonable prices) is a great motivational tool. Once a streak has begun they do not want to break that streak. If a day is missed, they may make it up the following day as a second practise session.