AP Central: This site from the College Board has all the information you need about advanced placement programs and opportunities.
 
College Board AP Student : Connecting Students to College Success: The College Board is a not-for-profit membership association whose mission is to connect students to college success and opportunity. Founded in 1900, the association is composed of more than 5,000 schools, colleges, universities, and other educational organizations. Each year, the College Board serves seven million students and their parents, 23,000 high schools, and 3,500 colleges through major programs and services in college admissions, guidance, assessment, financial aid, enrollment, and teaching and learning. Among its best-known programs are the SAT®, the PSAT/NMSQT®, and the Advanced Placement Program® (AP®). The College Board is committed to the principles of excellence and equity, and that commitment is embodied in all of its programs, services, activities, and concerns. The website provides comprehensive information for students, educators and parents.. 
 
Big Future: Information by the College Board on how to find colleges, explore careers, and find scholarships and financial information.

Khan Academy:  Excellent FREE resource for practice exam questions and individualized learning experiences.

EdX:  FREE online courses, including courses for AP Exam prep. 

TEA - AP/IB Incentives: This site from the Texas Education Agency features quick links and other valuable resources about advanced placement and international baccalaureate programs in Texas.