Proposals for other increases to the duration of schooling - including a lengthened school year and an earlier start to compulsory schooling (at age six) have been discussed, but neither has been implemented. Three options - or their combination - could be adopted to extend compulsory instruction time: an increase in the number of instruction days per year, extending the number of years of compulsory schooling, or an increase in the number of instruction hours per day. For instance, school vacations could be shortened to gain more instruction days a year. Among top PISA 2015 performers, Japan, Korea and Australia have fairly long school years of 190 days or more. This option could be especially attractive for Lithuania for two reasons. First, Lithuania’s instruction year (168 days in lower secondary) is among the shortest in comparison to OECD member countries (on average, 184 days) with frequent interruption for breaks, including almost three-month long summer holidays.