Can't schools spread out their tests???

There are a lot of things going on lately and I feel like I have been trying to understand and prepare myself a lot better than I have been before but I still feel super behind and unprepared and like I don't understand the materials like I'm supposed to be. I have more tests coming up. I have one in spanish, one in chemistry, and one in biology. I am definately not prepared for spanish at all. I'm comprehending the concepts in biology but I don't have the terminology memorized even remotely and I'm sure that the terminology is going to be the most important thing to know for the test. For chemistry oh boy I need to do some hardcore studying because I have tried so hard lately to pay attention and learn everything but I still feel so far behind and don't understand it all. I'm going to study tomorrow big time but I still don't think it will be enough to do very good on the test. I guess we will see how this all goes! Yikes!