In order to reduce the
amount of streaming in the school, the principal must address teacher attitudes towards grouping students by ability, must talk with those parents who want to
hang on to ability grouping, and must address the fact that they can't
change grouping practices without reorganising professional learning, assessments, teaching plans and so on.
And since the 1970 ′ s on average there's about a 4 % increase in water vapor over the Atlantic Ocean and when that gets caught into a storm, it invigorates the storm so the storm itself
changes, and that can easily double the influence
of that water vapor and so you can get up to an 8 % increase, straight from the
amount of water vapor that's sort
of hanging around in the atmosphere.