Exam Sprint Sign in

Home Lessons Quick lessons Courses Ask Merit AI Tutors Merit Tutors' Videos

Study tools

Tonight's planPlus Exam Sprint My schedulePlus ProgressPlus

Exam Sprint

Your exam, planned day by day.

Free diagnostic in 10 minutes.

Lessons for what you're learning in class. Merit Plus suggests videos for what you're learning in class. Free for your first month.

Sign in to save lessons, track topics, and get a study plan.

Popular courses AP Calculus BC AP United States History AP Physics 1: Algebra-Based AP Computer Science A AP Environmental Science AP Precalculus AP Statistics

Top channels

Heimler's History

The Organic Chemistry Tutor

Michael Porinchak - AP Statistics & AP Precalculus

Pricing For teachers How ranking works About Merit

About Privacy Terms

Videos play on YouTube. AP® and SAT® are trademarks of the College Board, which is not affiliated with Merit.

© 2026 Merit

Home Lessons Courses Ask AI Tutors Plan Sprint You

Science With Johnston

@sciencewithjohnston· 18K subscribers· 5 lessons on Merit· 4 topics

AP Biology · AP Statistics

View on YouTube

AP Bio: Water

Science With Johnston

63K views on YouTube · 12 years ago

AP Bio - Cellular Respiration - Part 1

Science With Johnston

56K views on YouTube · 12 years ago

AP Bio · Cellular Respiration

AP Bio: Photosynthesis - Part 1

Science With Johnston

50K views on YouTube · 12 years ago

AP Bio · Photosynthesis

AP Bio: Community Ecology - Part 1

Science With Johnston

18K views on YouTube · 12 years ago

AP Bio · Community Ecology and Biodiversity

Biology: Experimental Design

Science With Johnston

14K views on YouTube · 12 years ago

AP Stats · Experimental Design