Before algebra, the student is primarily working with numbers.
In Algebra they begin thinking of numbers in terms of symbols instead of specific values.
In Geometry the student begins to learn concepts and develop proofs. Values are no longer just numbers, but lengths of line segments or the measure of angles.
Algebra II gets more heavily into functions in preparation for Calculus.
A site that might help...
http://www.mathgoodies.comI found this site in an attempt to see if there was a site where a kid could go and get information about the area of a parallelogram. I'm certain there are others. Do google searches on the specific topics on which your daughter needs help. I found the "mathgoodies" site by searching (parallelogram area).
Other sources... Local colleges and universities... specifically Math Departments. Explain your problem and where your child is. Ask for not necessarily the best students, but those who can express themselves the best. You may have to pay a few bucks, maybe 10 or 15 an hour, but it will be individual help. Then write a glowing letter to the student thanking him or her for her help, and another to the Math Department Chair expressing your gratitude for the excellent education they are providing.
There are also students in your child's school who excel in math. Don't offer them money at the outset, but pay them a little, maybe 5 or 10 an hour, and write a glowing letter, send it to their school, and ask that it be placed in their academic record.
The letters may sound a little stupid, I'll tell you, they make a difference when employers or other institutions consider that student.