Success!
Second day of "summer school" for my boys. Each had the task of working 15 minutes with the vocabulary software.
Result: They both worked concentrated for 30 minutes, without complaining, without asking once how much time had passed - they were quite surprised how long they had spent "learning".
Result: They both worked concentrated for 30 minutes, without complaining, without asking once how much time had passed - they were quite surprised how long they had spent "learning".