Well for her 10th grade year (focus on essay writing), she did one paper per literature book that we did not study in depth (about 10), and one paper per history chapter (which included some research and was about 12). She also wrote up about 9-10 science labs and did one in depth research paper of about 10 pages that she presented at two different places.
During this year she also wrote and edited a complete novel. Writing is fun for her so this was quite a bit of writing, but she write well and fast. As for the timed SAT essays, we are only working on these now during her junior year. it is not required anymore. She will take the SAT in December and I'm only having her do a few of these.