In fact, in France, schools don't test kids. Most of the time, initiative comes from the parents/ or the teacher who noticed low achievement but at the same time bright behaviour from their kids. Our son was tested by a psychologist and we brough the results to school with the report, who in our case conlude that our son is obvioulsy bright but with a non homogenous IQ...
The Teacher (and even the school psy) are a bit confused by the gap between the VCI and PRI and the fact that there is no FSIQ in the report.
