how to improve my critical reading and writing skill

<p>hi everyone.
I am an International student in the US. This is my 2nd year in a high school in Michigan. I am a Sophomore this year.
I just took Psat this October and my scores are: Math 71, critical reading 49, writing skill 51. I think it’s not a good score. I know I will still have about 1 year and a half to improve my English before I apply a college, but I really want to get a high SAT score like above 2250 to get into an Ivy League college.
I know I have a huge language gap to fill in and I know it should be a tough work. but can anyone here give me some suggestions on improving reading and writing skill? thanks a lot!
Any suggestions will help!</p>