Primary school is grades k-6 (or k-5 in some cases) and secondary school is grades 7-12 (or 6-12 in some cases).
Feelings of anger, fear, helplessness and disappointment are common emotional responses to test anxiety.
Including the good and bad of yourself would be the most honest. Like I'm not the best at math but, I try my best, finish my work and ask for help when I need it. I don't know if this is the kind of answer you're looking for.