Ten Frame
A 2×5 grid for teaching addition, subtraction, and number bonds to 10. Click cells to add or remove counters.
Single Ten Frame (0-10)
Count: 7
Double Ten Frame (0-20)
Count: 14
Counting Scene
Visual counting scenes with different objects arranged in patterns. Click each object to count it!
Click each star to count it!
Counted: 0 of 6
Apples in array (5 per row)
Number Line
Interactive number line with draggable markers and jump arcs for visualizing addition and subtraction.
Click anywhere to move the marker
With jump arcs showing 3 + 4 = 7
Base Ten Blocks
Visual place value manipulative showing tens (rods) and ones (unit cubes). Click to add or remove blocks.
3 tens + 7 ones = 37
Place Value Chart
Three-column chart showing hundreds, tens, and ones with visual block representations.
Use the +/- buttons below to change values
Analog Clock
Interactive clock face for learning to tell time. Drag hands or use arrow keys to set the time.
Shape Builder
Drag shapes from the palette to create composite shapes. Double-click to rotate, select and delete to remove.
Drag shapes from the palette. Double-click to rotate. Press R or Delete when selected.
Shape Display
Static display of individual shapes in various colors and rotations.
Triangle
Square
Rectangle
Circle
Hexagon
Rhombus
Trapezoid
Right Triangle
Coordinate Plane
Interactive coordinate grid for plotting points and graphing. Click to add points, supports all four quadrants or first quadrant only.
First Quadrant (Grade 5)
All Four Quadrants (Interactive)
Click to plot points
Fraction Bar
Visual fraction representation using horizontal bars. Click parts to select them interactively.
Static: 3/4
Interactive: Click to select parts
Click to select parts
Fraction Comparison
Compare multiple fractions visually with aligned bars.
Which is larger: 2/3 or 3/4?
Dot Plot
Statistical data visualization showing frequency distribution. Each dot represents one data point.
Test Scores Distribution
Interactive: Click to add data
Click to add dots, right-click to remove
Tape Diagram
Bar model for visualizing part-whole relationships and ratios. Essential for ratio and proportion problems.
Ratio 2:3 (Boys to Girls = 10:15)
Unknown value (3x + 2x = ?)
Ratio Tape
Simplified tape diagram specifically for two-quantity ratios with automatic value calculation.
Recipe ratio: Flour to Sugar = 3:2, Total = 25 cups
Histogram
Binned frequency distribution for Grade 6 statistics. Shows data grouped into intervals with bar heights representing counts.
Test Scores Distribution (5 bins)
Relative Frequency Mode
Box Plot
Five-number summary with quartiles and outlier detection using the 1.5 × IQR rule.
Horizontal Box Plot with Labels
With Outlier Detection
Area Model
Rectangle area models for multiplication and division using the distributive property. Perfect for multi-digit multiplication.
Simple Multiplication: 5 × 8
Partitioned Multiplication: 23 × 14 = (20+3) × (10+4)
Volume Builder (3D)
3D rectangular prisms with Three.js rendering. Visualizes length × width × height for Grade 5 volume concepts.
Small Prism: 3 × 2 × 2 (with grid)
Larger Structure: 5 × 3 × 3 (solid)
Pie Widget
Circular fraction model using pie/cake context. Click slices to toggle eaten/remaining in interactive mode.
Apple Pie (5/8)
Cherry Pie (4/6)
Birthday Cake (6/8)
Interactive (4/6)
Click slices to eat/restore
Chocolate Bar
Grid-based fraction model using chocolate bar context. Shows eaten vs remaining pieces.
Milk (3/10 eaten)
Dark (5/12 eaten)
Interactive (4/10)
Click pieces to eat/restore
Measuring Cup
Liquid measurement fraction model. Shows filled amount as fraction of capacity.
Water (3/4 cup)
Juice (2/4 cup)
Milk (5/8 cup)
Interactive (3/4)
Click marks to set level