It is hard to manage high school and life, particularly when you have work, activities, and/or other responsibilities outside of school. These websites and videos are just a few that may help your student.
Eight Ways to Take Control of Your Time - College Board (who publishes the AP program) provides the BigFuture tools for high school students
Take Control of Homework - also by College Board
Balancing High School and Part-Time Work - also by College Board
8 Time Management Tips for Students - Harvard University published this, which is aimed at college students, but most of it applies to high school students, as well!
Crash Course Study Skills playlist - among the many topics included are reading assignments, planning and organization, memory, procrastination, and studying for exams.
Crash Course World History - the first few videos are not relevant to this course, but after them, pretty much everything is!
Heimler's History - Heimler's History is a fantastic WHAP-M oriented resource - not just for content (what happened) but also for skills and writing. This page has a list of Heimler's AP World History videos.
AP World History Anti-Social Studies - Anti-Social Studies has some great WHAPM videos for content, skills, and strategies.
College Board AP World History - this has unit reviews as well as practice sessions.
I recommend your student use the reviews for each unit in preparation for unit exams, the fall semester exam, and the AP exam.
I recommend your student use the practice sessions in preparation for the semester and AP exams. Some will not be relevant until the spring; your student will know when we are working on the various skills.
Unit and Topic videos are available on AP Classroom. Your student may access them anytime.