Day of Anger

Today I got a bad grade. The culprit had a classmate who used his phone when he could not. My day started badly.

<em>solas las oraciones son correctas pero como un parrafo, no tiene sentido, para mi</em>

I must force myself twice for that rate does not affect my GPA <em>no entiendo</em>

*as they say Promedio de Notas ?