Based on our record, HoDoKu seems to be a lot more popular than I Know It. While we know about 14 links to HoDoKu, we've tracked only 1 mention of I Know It. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
For supplemental math, try “I Know It” iKnowIt.com. There are cute cartoon animations for kids, and hundreds of review math lessons/skills/topics. Source: almost 2 years ago
Strmckr already gave you good advice on the order in which you can learn more advanced techniques. Some apps offer a practice mode in which you are given a specific grid that definitely needs that technique that you are trying to practice. One of those is my website sudoku.coach. The other one I know of is the windows software hodoku. Source: 11 months ago
On a Windows PC, Hodoku lets you input your own puzzle. You can just Copy and Paste this into the software:. Source: 12 months ago
Don't know about any sites but you can learn specific techniques in hodoku. Source: 12 months ago
If I'm solving in Hodoku it's easy enough to switch to full notation (Options | Show All Candidates | click "no"), but my usual pencil/pen/eraser on paper takes slightly more effort. Source: about 1 year ago
Download/install Hodoku (Free, as in 'beer'; will run on Mac/Windows/Linux - it's a Java .jar file (also available as a Windows executable file). Source: over 1 year ago
childsplay - Childsplay is a collection of educational activities for young children and runs on Windows, OSX, and Linux. Childsplay can be used at home, kindergartens and pre-schools.
Simple Sudoku - Freeware Sudoku Puzzle Maker and Solver
GCompris - Educational Game for Children 2 to 10 years old.
Yasminoku - Sudoku game and solver totally written in DHTML.
Math Games - Math Games is a website which kids in Preschool through 8th grade can practice math.
nsudoku - A Sudoku game made with ncurses.