Digital Learning Objects

Mobile Phone Plans provides a context for the use of line graphs.
Mobile phone plans: find the best deal 1
Mobile phone plans: find the best deal 2
Mobile phone plans: find the best deal 3
Mobile phone plans: peak and off-peak
Mobile phone plans: one company
Mobile phone plans: several companies

Trigonometry develops the concept of trigonometry from simple comparisons to more formal approaches.
Trigonometry: measuring with triangles
Trigonometry: similar triangles
Trigonometry: cosine
Trigonometry: sine
Trigonometry: tan
Trigonometry: using sine
Trigonometry: using cosine
Trigonometry: using tan
Trigonometry: find hypotenuse
Trigonometry: find angles

Plasers provides practice in the use of cartesian coordinates and operating with integers. 
Plasers: choose coordinates (+)
Plasers: choose coordinates (+/-)
Plasers: enter an equation (+)
Plasers: enter an equation (+/-)
Plasers: place bubbles (+)
Plasers: place bubbles (+/-)

Area of Compound Shapes helps users to find the area of compound shapes by breaking them into rectangles and triangles.
Compound shapes: small shapes
Compound shapes: medium-sized shapes
Compound shapes: large shapes
Compound shapes

Area of Triangles helps users to find the area of triangles.
Area of triangles: triangles with a right angle
Area of triangles: height intersects with the base inside the triangle
Area of triangles: height intersects with the base outside the triangle
Area of triangles: triangles without vertical or horizontal sides
Area of triangles

Biscuit Factory explores ratio relationships in the context of gears.
Biscuit factory: ratios
Biscuit factory: complex ratios
Biscuit factory: directions
Biscuit factory: create a two-gear system
Biscuit factory: create a three-gear system
Biscuit factory: gears and speed

Drive helps users solve proportional problems with distance and time.
Drive: hard problems

Squirt helps users explore and express proportional relationships.
Squirt: three containers: complex proportional relationships

Bases helps users explore numbers in different bases using a place value model.
Bases

Matchbox Machine is designed to help students understand how to construct and interpret boxplots.
Matchbox machine: take a sample
Matchbox machine: plot the variation
Matchbox machine
Matchbox machine: varying scoop size and speed
Matchbox machine: varying scoop size
Matchbox machine: varying speed

Rice Crisp Machine is designed to help students understand how to construct and interpret boxplots.
Rice crisp machine: take a sample
Rice crisp machine: plot the variation
Rice crisp machine