Level 4 Geometry Learning Objects

Contours.
Contours explores how contours are used to represent a 3D 'landscape' (more info).
Contours: about contours
Contours: mystery shapes
Contours: loony landscapes
Contours Icon.
Measuring.
Measuring explores similar shapes and objects and scaling using ratios (more info).
Measuring: similar shapes
Measuring: scaling up
Measuring: scaling down
Measuring: similar solids
Measuring: scaling up solids
Measuring: scaling down solids
Measuring: scaling surface area
Measuring: volumes
Viewfinder.
Viewfinder requires users to arrange a 3D scene so that a 'photo' from a certain angle replicates a given 2D picture (more info).
Viewfinder: up front
Viewfinder: flip side
Viewfinder: backwards glance
Viewfinder: all angles
Viewfinder Icon.
National Library of Virtual Manipulatives.
NLVM: Space manipulatives
Pentominoes
Tessellations
Pattern blocks
Geoboard
Geoboard: coordinate
Geoboard: isometric
Congruent triangles
Platonic solids
Polyominoes
Learn Alberta.
Learn Alberta: Exploring Space series (more info).
Exploring angles
Exploring dilations
Exploring quadrilaterals