[pinksequins]

Going back to the structure of the letter and taking AZTheta's concerns into account, your supporting points need to explain how you are going to achieve the objective of making grades this coming semester. The letter needs to include an action plan.

Not to diminish the issues last year, your supporting arguments nevertheless should not read as a list of woes. Clearly something was amiss to cause you to miss the grade requirements. Instead focus a supporting argument on how you will get from point A to point C. You may need a mini-plan for each academic area (such as the TA for calculus class and maybe taking meals with the German house residents so that you have time to practice your language skills.).