Raise ACT Math and Science! Two Week Cram!!

I have been working all summer to improve my score but to no avail. I was wondering if anyone could give hints on how to improve my ACT Math and Science score. I took the June ACT, and all my scores went down. I am taking the test in July and based on how I do I might take it in September.

My highest for the two sections is a 32 in Math and a 28 in Science. I do not know what else to do. I have been taking practice tests and REALLY trying to find out why and what I am doing wrong. Are there any free resources that anyone would recommend? I have already gone through the red book and Princeton.