There are many online resources that are helpful to ESL students who are learning the rules of grammar.
This site was originally owned and written by Karin M. Cintron.
Here is the archive of the original Karin M. Cintron biography page.
This site is now edited by another Karin, Karin Martinez.
You can email the new Karin at firstname.lastname@example.org.
You can also find the Karin's ESL Partyland on Facebook and Twitter.