AP Computer Science Tutor Brandon Horn

Private online AP Computer Science Tutoring

Private sessions can be structured as needed. Instruction on topics of your choice is available as is help with homework and projects.

  • Choose any AP CS topics
  • AP Computer Science homework help
  • Risk free – pay after your first session

Details and pricing for AP CS tutoring

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Common AP Computer Science A Topics

  • Classes and objects
  • Inheritance and polymorphism
  • Arrays and ArrayList
  • Recursion
  • for, while and foreach loops
  • The String class
  • Interfaces (no longer tested) and the compareTo method (still tested with respect to String objects)
  • New AP CS Labs (ex: Consumer Reviews)
  • Old Magpie, Elevens and Pictures Labs (content still tested)
  • The GridWorld Case Study (no longer tested)

Common AP Computer Science Principles Topics

  • Relational and Boolean Operators
  • Selection
  • Iteration
  • List operations
  • Procedures
  • Robot programming
  • Create Performance Task
  • Explore Performance Task (no longer part of Exam)

AP Computer Science A Tutoring Benefits

Succeed on the AP Computer Science A Free Response

  • Become familiar with topics covered every year
  • Recognize commonly tested problems and develop algorithms to solve them
  • Approach problems effectively and make appropriate use of time

Approach recursion problems with confidence

  • Determine the output of recursive methods
  • Use a stack to trace recursive methods
  • Recognize problems with simple recursive solutions
  • Implement recursive methods

AP Computer Science Principles Tutoring Benefits

Succeed on the AP Computer Science Principles Exam

  • Become familiar with topics covered every year
  • Approach problems effectively and make appropriate use of time
  • Master the pseudocode language and robot instructions used on the AP CSP Exam

Approach your Performance Task with confidence

  • Understand the requirements and scoring for the Create Performance Task
  • Walk through sample submissions and scoring
  • Master effective techniques for earning each rubric point

AP CS Principles Performance Task

There is no restriction on the amount of preparation a student may undergo before beginning the AP CS Principles Create Performance Task. I am happy to provide preparation for students who will later complete the AP CSP Create Performance Task. I can also provide assistance with practice Performance Tasks that are not intended to be submitted to the College Board. The College Board limits collaboration on a Performance Task that will be submitted for scoring as part of a student’s AP Exam grade. I cannot provide assistance with Performance Tasks that will be submitted to the College Board.

About Brandon Horn

AP CS Tutor Brandon Horn

More about Brandon Horn

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Experience working with girls in AP Computer Science

Why is this important?


I hold a B.S. in Computer Science from the New Jersey Institute of Technology. I’m a New Jersey certified teacher at Mountain Lakes High School.

I was a 2016 AP Standards Setting Committee Member. The Standards Setting Committee recommends cut scores for each of the 1-5 AP Exam scores.

When I worked at West Windsor Plainsboro High School South, teams from my classes won the 2007 and 2010 NJIT High School Programming Contests. My students write Java games and mobile phone games as well as other unique and challenging projects using Eclipse, BlueJ, and the command line.

In 2011 & 2012, I was selected as an instructor for Google’s CAPE Program. Together with other top CS educators from around the country, I taught animation, robotics, mobile programming, and other skills to aspiring high school freshmen. Local TV station NY1 featured the New York City CAPE Site at which I taught.

My services offer substantial advantages over tutoring by college students, professors, programmers, and online tutoring conglomerates. I tutor only one subject for which I am extensively qualified. I work with only one student at a time unless a group session has been arranged. My students complete all assignments themselves and develop an understanding of the underlying concepts.

Mr. Horn’s AP Computer Science A Exam Results

CS A Exam @ Mountain Lakes 5 4 or higher
2020 (19 students) 89.5%
2019 (20 students) 85.0% 100.0%
2018 (9 students) 77.8% 100.0%
2017 (8 students) 100.0%
2016 (my first year – 5 students) 40.0% 100%
CS A Exam Worldwide 5 4 or higher
2017 (~61,000 students) 24.4% 45.3%
2016 (55,425 students) 20.6% 41.0%
CS A Exam @ West Windsor 5 4 or higher
2015 (52 students) 86.5% 100%
2014 (39 students) 84.6% 100%
2007 85.0% 95.0%
2006 (my first year) 65.2% 91.3%
2005 (prior to my arrival) 30.4% 78.2%

AP CS Exam Results since 2005

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How Online AP Computer Science Tutoring Works

Online AP Computer Science isn’t just more convenient than in person tutoring, it’s also effective. You can work in the environment in which you’re most comfortable. Whether you prefer a 3 monitor setup in your bedroom or a Macbook in your backyard, you aren’t limited to a messy kitchen table.

  1. Share screens with Google Meet (no camera needed)
  2. Talk using your computer microphone or a regular phone
Online tutoring session

Online tutoring session - Student's screen is on left

I’m available as an online AP Computer Science tutor anywhere in the world. I’ve worked with students in nearby locations including Princeton, West Windsor, Plainsboro and South Brunswick New Jersey. I’m also comfortable working with students from different time zones including Texas, California, London, Germany and Singapore.

I do not privately tutor my own students. Students currently enrolled in my classes who are seeking help should schedule time with me during their study hall periods, during lunch or in the morning.

Brandon Horn
mrHorn.com, Inc.

Contact Brandon Horn