Castle Rock Research has combined study guides and interactive practice questions into a comprehensive and fully integrated study solution that works across multiple platforms and is easily accessible wherever you are. 

Whether you have a PC or a Mac, a smartphone or a tablet, iOS or Android, SOLARO is compatible across a variety of platforms to ensure the best studying experience on whatever devices students have available to them. 

Each state has its own educational standards and expectations that students are graded against. Instead of a generic set of concepts, SOLARO aligns with what students will cover in the classroom.

Life happens, and you may be interrupted during your studying. SOLARO never forgets what you were reviewing. Simply check your SOLARO To-Do list to pick up where you left off.

Helping the world learn, one student at a time!