Welcome to the 23rd edition of the Mathematics and Multimedia Blog Carnival. This is a repost from Mathematical Palette, a blog which I no longer maintain.

In this edition, we have a miscellany of mathematics and mathematics teaching articles.

**John Cook** presents a proof technique that seems to give you something for nothing, an interesting Binomial coefficient trick, posted at the Endeavor.

**Shaun Klassen** has a clear explanation about the basic concept of limits in Using Limits to Find Tangents posted at Mathematics Concepts Explained.

**Dave Richeson** shares his readings about Plato’s approximation of posted at Division by Zero.

**Colleen Young** takes us to several good resources on Rich Questions in Mathematics posted at Mathematics, Learning and Web 2.0.

**Dan Bowdoin** shares his new strategy in monitoring homeworks in Google Form and QR Homework Check in posted at Technology Integration for Math Engagement.

**Dave Gale** posts a grid audio tool that produces sounds when clicked in Is Symmetry Beautiful posted at Reflective Maths Teacher.

**Malke** exhibits here excellent classroom activity featuring Stars, Factoring & Patterns posted at The Map is Not the Territory.

**Shana Donohue** discusses practical teaching tips in 5 Principles of the Evil Teaching Guru posted at Zero Sum Ruler.

**Emily Allman** advises herself in teaching in A Note to My Former Self posted at Algebra, Essentially.

**Mr. D** invents a new game, The Game That Will Save Zynga, posted at I Want To Teach Forever.

**Justin Lanier** answers the question “In what ways can math be part of your life?” posted at I Choose Math.

**Robert Talbert** has an interesting and constructive article about Khan Academy in “What does Khan Academy” need? posted at Casting Out Nines.

**Love to Learn Today** shares a good Online Dictionary for Kids.

That’s all for Math and Multimedia Blog Carnival 23, see you in the next carnival.

*Photo Credits: Flickr (click each image to see source)*