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How Big Is the Guatemala Sinkhole?
A fun and short activity from Robert Kaplinsky to find the volume of a sinkhole. Read More
How much did the temperature drop? Absolute Value
Robert Kaplinsky describes the lesson this way: "This lesson uses a time lapse thermometer video as a context for discussing integer operations and absolute value. The video should provide some added meaning to the classic temperature drop problem." Read More
Fast Growing Plant
An activity where students must determine how tall the plant was x time ago if it is a certain height now and how fast it will grow. Read More
Fraction Talk (and Pie)
Math teacher Chase Orton lays out the instruction he used, starting with pictures of pies, in order to get students to use benchmark fractions. Read More
Geometric Subitizing: Counting Discussion Cards
The discussion cards posted on this site can be used to discuss counting and grouping strategies with students. This could be a great way to engage students using vocabulary around numbers and shapes. Read More
Desmos: Linear Inequalities in Standard Form
Desmos is an online graphing calculator. Many teachers have created activities for their classes using the calculator. Activities on the site are created by teachers and Desmos staff and will vary. You can also create your own activities. Read More
Elementary Always, Sometimes, Never
In Always, Sometimes or Never, students identify whether a mathematical statement is always true, sometimes true, or never true. This link offers statements appropriate for students in early math levels, but it can be adapted to any level or content by changing the mathematical statement students are working with. Read More
Conservation: The More Things Change The More They Stay the Same
This blog post from Graham Fletcher (Gfletchy) shares series of very short and very accessible videos for exploring the concept of conservation in weight, length, liquid, and number. Perfect for learners at many levels of math and language to discuss what they notice and wonder. Read More
Create a Graph
You and your students can use this online tool to create graphs. Read More
Desmos: Graphing
What if students could "play" with graphs and quickly see what changing a single component would do to a graph (such as changing the b in y =mx+b)? Desmos is user friendly and thoughtfully uses color and layout in ways that support students' understanding. Read More