...and instant problem lookup from every math topic
In addition to supplying readers with over 900 problems of our own creation, we've included curated lists of the problems from all 23 released SATs, placed right in the topic and sub-topic section of the book where the primary solving skills for those problems are explained, and we've called out the most famous (infamous?) of those problems by inducting them into the 1600.io SAT Problem Hall of Fame.
This innovative feature lets students learn a skill, perform the exercises in the book, and then try their hand at some related real test problems to ensure that the lessons are being absorbed (with the help of our legendary explanatory videos, of course).
This is just one of the myriad ways that we put ourselves in the place of the student when designing the structure and content of this text, because we know that students striving to improve themselves are best served with empathy, not sympathy.