Most teacher websites online will have a good selection but the worksheets might be difficult to understand, so be very careful of which ones you chose. I would suggest going to a learning center and asking about their workbooks, and see if they can give your child an evaluation to see which subjects are weaker.
There are plenty of second grade worksheets available at gradeschoolprints dot com. The elementary school kids will have lots of fun when you present them with the sheets.
Second grade worksheets are going to slightly be a little harder for some children compared to the first grade worksheets. There are, of course, more steps to learn with all subjects.
One can find free second grade math worksheets online at the "Cool Math" website. This website is the best in the world for teaching kids math the fun and easy way.
If you go to education.com you can find several third-grade worksheets. They have many different subjects and worksheets to help you out all the way up to the 12th grade.
There are many great websites to find tons of worksheets for second grade students. One site for math is Aplusmath.com. A couple sites for reading are readkiddoread.com and http://www.readthinkwrite.org/.
you can just type in 8th grade English language arts California standards or 8th grade English worksheets
go to softschools.com
www.superteacherworksheets.com/spelling-level-b.html would be the best website to help you in your search for Second grade spelling worksheets. Also you could try to check your local office stores such as big lots or office depot.
You can find math worksheets for sixth grade students at www.homeschoolmath.net. These worksheets cover a variety of topics such as decimals, fractions, and equations.
http://www.tlsbooks.com/secondgradeworksheets.htm This website offers a plethora of free second grade worksheets for a myriad of different subjects. Subjects include math, language arts, science, social studies, and more.
One can expect to find free math worksheets for 9th grade students by looking in teachers manuals and then photocopying the lesson and printing it out.
I recommend going to gradeschoolworksheets dot com to get second grade worksheets for free. They have many custom versions to pick and choose which one you want.