Not quite what you are asking for, but there is a great tool called Kickstand (www.kickstandsystems.com)that is in use in a number of districts that allows curriculum to be aligned with standards and organized in a defined scope and sequence. At the core of the systems is a big standards aligned curriculum library. The system will deliver content to a student and then assess them on that content. Based on the result of the assessment the system can deliver new resources for remediation or allow the student to move ahead at their own pace. Content is managed by the district and allows content ratings by students and instructors. This is really where learning technology needs to go to enable individualized instruction in online settings at scale. Full disclosure: I wrote the first version of the Kickstand product about 5-6 yrs ago