Andrew:
I went to my school ibrary then, I read books.
I went to computer class then, I memorize computer components.
I meet my math tutoring teacher so, I learned math. After I did math
homework

Correction:
I went to my school library then, I read books.
I went to Computer class then, I memorized computer components.
I met my Math teacher so, I learned Math. After that, I did math
homework.

Explanation:
1. Capitalized the proper nouns such as;
    a. Computer class
    b. Math
2. Please be consistent on the tenses of your verbs such as;
    a. memorized
    b. met
3. Don't forget the period on every end of your sentences.


Comment:
Hi Andrew! Thank you very much for attending the class and sending your homework to teacher. Keep up your good work. You almost perfect your homework. Just be reminded on teacher's explanation about your homework and try to avoid it next time. Thank you and Bye! ^-^
-Teacher Joanna