My son took a sample new SAT a few months ago. One of the differences from the old SAT & new is the level of math. SAT used to go through Geometry, while ACT you needed at least 1/2 year of Algebra II. The new SAT is trying to match the level of the ACT. But I would check what topics are covered in one of the above resources. Not all Algebra classes cover the same topics particularly with the changes in Common Core.
Keep in mind that the SAT/ACT test the problems do go from easiest to hardest. So your daughter can probably get a 'good' score for her age without having mastered all of the material. It is more important that basic Algebra & Geometry are solid.
As to the essay. It's the same as the old SAT just the essay is optional and not included in the total score. This is also in line with what the ACT does.
