This is a classic mini-game Fifteen Sliding Puzzle. This option works in the browser, in it you need to specify a regular picture, the program itself will cut the picture into squares and mix them.

🎮 Play and challenge friends in Nối Từ, a Vietnamese word-chain Discord bot with tournaments, AI opponents, and a robust ranking system.

Across the country, educators continue to wrestle with big questions about math curricula. Two years ago, the California education board’s adoption of a long-gestating new math framework added more ...

Sean Donovan, math teacher at Brewer High school, teaching his Career Math class on October 28. After years of declining test scores the Maine department of Education last month announced what it ...