Mr. Janak's Math
Puzzle Master
Past and present. One leaderboard. Who's the Puzzle Master?
Exclusive to Mr. Janak's students
Interactive Lessons
Learn step-by-step with math tools
Prime Numbers
Identify prime and composite numbers by finding their factor pairs.
Multiplication Algorithm
Master the standard algorithm for multi-digit multiplication.
Number Line Explorer
Find fractions and decimals on a number line.
Add and Subtract Fractions
Add and subtract fractions by finding common denominators visually.
Fraction Algorithm
Add and subtract fractions on paper with a T-chart.
Fraction Division
Divide fractions and whole numbers using visual area models.
Unit Conversion
Convert measurements with the reference chart and a pair of arrows.
Volume Explorer
Build 3D shapes and pull them apart to see how volume is calculated.
Area & Perimeter
Change the size of rectangles to see how area and perimeter change.
Tax Zones
See the city, county, state and country you live in on a map.
Math Games
Fun ways to practice your skills
Geometry SMS
Classify shapes and polygons using a retro T9 texting interface.
Place Value Blitz
Identify deciding place values and compare magnitudes in a high-speed challenge.
Coordinate Battleship
Use x and y coordinates to find and sink the enemy fleet.
Multiplication Mastery
Race against the clock to solve your multiplication facts.
30 Second Challenge
Solve as many problems as you can in 30 seconds. Build a streak to multiply your points!