My proposal
1) Be cost sensitive on poor mostly rural kids
2) Junior secondary should be domiciled in existing primary - kids to proceed to std 7,8 - gives gov two years to build one extra class. Gov to hire or transfer junior high school teachers to primary school- so graduate teachers teach from class 7-9 - many in primary schools already have graduate degrees. Primary school should have one principal - primary head teacher - and junior secondary had teacher.
3) Secondary will therefore start from 10,11,12 - senior secondary teach them A level - for those academically inclined
4) University to take three years.
You cant have class 7 kids joining existing high school..that is Ufool nonsense.
The extra classroom will fix capacity challenges in high schools...can also become computer labs or tech labs