Lowering Standards Hurts

After completing 86 credits toward my Bachelor's degree, I earned my first non-A grade. The B+ in British Literature hurts, but I will survive. What did I learn from the disappointing grade? I learned that even though a student attends every class, having read the assigned materials, and participating fully, that student may suck at taking tests! So, when I am a teacher, I will never base any student's final grade on just two tests for the semester.