Here is an honest, practical review based on how the platform actually works for parents and students.
I understand you're looking for a review of the "usuario y contraseña" (username and password) system for for 5º de Primaria .
The platform itself is fine. The credential system is intentionally controlled by schools. Ask your child's teacher directly – they can give you the correct user/password in 1 minute. No online search will find it.
