took me forever to finely get this down pat .
Low IQ ? louse ratings ? well here is how to fix both .
Works the same no matter what stage your colony is at .
ONE IQ ok so you have schools and they are empty and IQ is at 65 .
so take 10 % of your buildings with jobs ( 2000 k colonists = 200 jobs )
and deactivate the buildings and empty them . You will then see the schools start filling up .
wate a hour more or less your IQ will go from 65 - 80 to 150 - 200 depending on what stage of the game you are at .
Now deactivate schools reactivate the jobs .
Once they are all back at work set work load on light and give them 200 coins wate 20 mints give them 200 more coins wate 20 mints give them 200 more coins .
Each time your ratings goes up then drops then goes up and so on BUT the drop is less each time after around 800 to 1000 coins the rating could be between 85 and 100 % if its 85 % it will rise on its own at this point .
also set basic income for every one around 3 to 5 coins .
That is about all it takes you need alest high schools point to get any real gains in IQ