Lonely Wolf

Hello there.

I would like to know if there's a site where it can teach kids in ages between 6-8 years old to read and pronounce words. Because I am currently teaching my little sister to read but the problem is she can't read words with "ea","ou","ies", ect, in it. I am very worried because she's already in grade 2 and still doesn't know how to read those words. And there was times her teacher send us some books and a letter saying "Please always make her read this book before going to sleep." or sometimes her teacher call our house saying the same thing. Every time I ask my little sister to read she can always read it to me and I think she's improving little by little but when it comes to words she doesn't know she stops. So please help me!

I would like to know where you can find a site that teaches kids to read. Please help! Thank you.