In this game activity students practice comparing shapes and naming something that is alike or different about them.

In this Nrich problem students can work on both prime factorization and area of rectangles.

In this informational text, elementary school readers learn about the difference between weather and climate and about components of the climate system. The text can be used to practice visualizing and other comprehension strategies. Available in K-2 and 3-5 grade bands and as an illustrated book as well as a text document, the story appears in the online magazine Beyond Weather and the Water Cycle.

Students will create a personal narraitve by generating ideas for writing from their personal experiences, write details of their experience in an organized manner, and revise their draft to add details.

Learn about paper! How it's made, who invented it and what will paper be made of in the future! Create paper crafts and paper tricks and even make your own paper in this BrainVenture!

At the basic level, these Nrich challenges offer chances for children to practice number recognition, one-to-one correspondence and counting. However, some will begin to analyze and compare the three versions, explaining their findings and possibly drawing on ideas associated with probability.

SPARK tails artists Jim Denevan and Cris Drury as they create large earth works. This Educator Guide is about the history and tradition of artists making work in and about the natural environment.

This Nrich problem follows on from Twisting and Turning and More Twisting and Turning and offers students the opportunity to explore sequences of fractions, make generalizations, and prove conjectures. The rope trick in the first problem offers a moment of surprise when the rope becomes untangled, and this prompts curious students to want to explain what is going on. This third problem in the sequence ties up all the loose ends still remaining.

Students learn about linear programming (also called linear optimization) to solve engineering design problems. As they work through a word problem as a class, they learn about the ideas of constraints, feasibility and optimization related to graphing linear equalities. Then they apply this information to solve two practice engineering design problems related to optimizing materials and cost by graphing inequalities, determining coordinates and equations from their graphs, and solving their equations. It is suggested that students conduct the associated activity, Optimizing Pencils in a Tray, before this lesson, although either order is acceptable.

This Nrich problem embeds adding and subtracting fractions into a bigger problem to increase interest.

A lesson plan that can be used remotely or in-person for alphabet practice.

In second grade students need to learn to put words into alphabetical order (to the second and third letter) to help them when it's time to learn how to use a dictionary and glossary correctly later in the school year.

SOL 2.10: The student will demonstrate comprehension of information in reference materials:

c) Use dictionaries, glossaries, and indices.

The traditional autobiography writing project is given a twist as students write alphabiographies - recording an event, person, object, or feeling associated with each letter of the alphabet.

Alquimétricos is a collection of open source didactic toys: building blocks to mount structures and learn-while-playing about geometry, maths, architecture, mechanics, physics, chemistry, and much more. The initiative is focused on the design of DIY educational materials which are meant to be produced using a wide range of procedures, from ultra-low-cost-low-tech tool set (scissors and nails) to high-end-FabLab-standards (laser cutter, CNC milling, 3D printing), using an equally wide ranged material sort, including recycled packaging plastics, rubbers, cloths and cardboard composites throughout textile-embedded polymers, organic fibers or even lab-harvested fungus. Alquimétricos are meant to play, learn and share.

An interactive applet and associated web page that demonstrate the alternate exterior angles that are formed where a transversal crosses two lines. The applets shows the two possible pairs of angles alternating when in animation mode. By dragging the three lines, it can be seen that the angles are congruent only when the lines are parallel. When not in animated mode, there is a button that alternates the two pairs of angles. The text on the page discusses the properties of the angle pairs both in the parallel and non-parallel cases. Applet can be enlarged to full screen size for use with a classroom projector. This resource is a component of the Math Open Reference Interactive Geometry textbook project at http://www.mathopenref.com.

An interactive applet and associated web page that demonstrate the alternate interior angles that are formed where a transversal crosses two lines. The applets shows the two possible pairs of angles alternating when in animation mode. By dragging the three lines, it can be seen that the angles are congruent only when the lines are parallel. When not in animated mode, there is a button that alternates the two pairs of angles. The text on the page discusses the properties of the angle pairs both in the parallel and non-parallel cases. Applet can be enlarged to full screen size for use with a classroom projector. This resource is a component of the Math Open Reference Interactive Geometry textbook project at http://www.mathopenref.com.

Use aluminum foil, salt water, and activated charcoal to construct a simple battery strong enough to power a small motor or light.

These Nrich tasks are a great opportunity for learners to use reasoning to decipher mathematical statements. We often make mathematical claims that are only true in certain contexts and it is important for learners to be able to look critically at statements and understand in what situations they apply.

This video from WOUB Athens, presented as a parody of a popular TV network reality show, will help high school students review and prepare for the Ohio Graduation Test in Mathematics.

The purpose of this lesson is to introduce students to the planet Mars. This lesson will begin by discussing the location and size of Mars relative to Earth, as well as introduce many interesting facts about this red planet. Next, the history of Martian exploration is reviewed and students discover why scientists are so interested in studying this mysterious planet. The lesson concludes with students learning about future plans to visit Mars.