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Accelerated Grade 3 Mathematics

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Eligibility: CTY-level or Advanced CTY-level math score required

Prerequisites: Successful completion of Grade 2 Mathematics or equivalent

Course Format: Individually Paced

Course Length: Typically 6 months

Recommended School Credit: One academic year

Course Code: AG3

Course Description


This is a full-length online Accelerated Grade 3 mathematics course.  This course begins with a review of second grade mathematical concepts, covers all topics in the third grade Common Core State Standards, and includes enrichment topics to expose students to fourth grade concepts. This course prepares students for Honors Grade 4 Mathematics.

Lessons are provided through interactive videos, online interactives, graded assessments and projects. Students develop mathematical reasoning, learn critical thinking skills, and acquire problem solving techniques to investigate and explore Grade 3 mathematics.

Online course materials, such as videos, notes, interactive web pages, and practice problems with solutions, are provided for the student. Students progress through the course at their own pace and are expected to watch videos and review notes regularly. Each student is assigned to a CTY instructor to help them during their course. Students can contact their instructors via email with any questions or concerns at any time. Live one-on-one online review sessions can be scheduled as well to prepare for the graded assessments, which include homework, chapter exams, and a cumulative midterm and final.

Instructors use virtual classroom software allowing video, voice, text, screen sharing, and whiteboard interaction. Students are strongly encouraged to work on the course at least 1 hour a day, 5 days a week (for a 6-month enrollment), and email their instructors at least once per week.

Topics include:

  • Working with Large Numbers
  • Addition and Subtraction
  • Multiplication
  • Division
  • Introduction to Fractions
  • Introduction to Decimals
  • Measurement
  • Two-Dimensional Shapes
  • Area and Perimeter
  • Data Analysis

For a detailed list of topics, click the "List of Topics" tab.

math 3 course image

Materials Needed

There are no required materials for this course.

List of Topics

Working with Large Numbers

  • Whole Numbers to Ten Thousand
  • Ordering and Rounding Whole Numbers 

Addition and Subtraction

  • Addition Strategies
  • Subtraction Strategies
  • Addition and Subtraction Combined


  • Multiplication Strategies 
  • Multiplication Properties


  • Division Facts – Part 1 
  • Division Facts – Part 2 
  • Factors and Multiples

Introduction to Fractions

  • Definition of a Fraction
  • Equivalent Fractions
  • Compare and Order Fractions 
  • Add and Subtract Fractions

Introduction to Decimals

  • Tenths, Hundredths, Thousandths
  • Ordering and Rounding


  • Telling Time 
  • Liquid Volume and Mass 
  • Measure and Length

Two-Dimensional Shapes

  • Polygons 
  • Triangles
  • Quadrilaterals
  • Line of Symmetry

Area and Perimeter

  • Perimeter 
  • Area

Data Analysis

  • Picture Graphs & Line Plots 
  • Bar Graphs

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Help Room

Help Room

Each week, all students are invited to an open Elementary Math Help Room for Grades 3 and 4 run by a rotating staff of instructors. Students are encouraged to come with questions or just to meet other online students. Topics reviewed vary each week.

Grades 3 and 4 meet each Tuesday from 7–8 p.m. E.T.

Sample Video

Sample Video

Honors Grade 3 sample video


Technical Requirements

This course requires a properly maintained computer with high-speed internet access and an up-to-date web browser (such as Chrome or Firefox). The student must be able to communicate with the instructor via email. Visit the Technical Requirements and Support page for more details.

Zoom online virtual classroom
This course uses an online virtual classroom which can be used for instructor-student communication if the student has any questions about the course or curriculum. The classroom works on standard computers with the Zoom desktop client and also tablets or handhelds that support the Zoom Mobile app. Students will need a computer with the Zoom desktop client installed to watch any recorded meetings. The Zoom desktop client and Zoom Mobile App are both available for free download.

This course uses Respondus LockDown Browser proctoring software for designated assessments. LockDown Browser is a client application that is installed to a local computer. Visit the Respondus website for system requirements.

While Chromebook can be used to progress through the course, all exams must be completed on a PC or Mac.