This wickedly cool site lets you go from the far reaches of the universe to within an atom of a leaf. A great site for teaching scientific notation and positive/negative exponents.
Read, Write, Think
Use this online tool to create a comic about one of your math or science topics or of a vocabulary word. The comic must demonstrate your knowledge of that topic.
Can Fido read your mind? Can you figure out the math behind this trick? Play the game and see!
Various Links Organized by South Dakota Counts
This document has a list of links to some fun and challenging brain teasers!
This game board can be used with any sets of question cards. Students rotate the board for each question so that tasks are shared.
This is a great site to accompany the card game "Tens Go Fish".
This site lets kids use models to solve problems. It's very much like the Singapore Math models and only gives kids one strategy option. If you have a kid who struggles finding a way to solve though, this site will give examples.
Use the criss cross puzzle to create vocabulary puzzles for either math or science terms.
Create number lines, number grids, shapes, patterns, etc., & print in PDF or JPEG. Capture into a Notebook.
Sierra Vista Software
While this site is free, you'll have to create an account to use it.