Use this bright colorful Sieve of Eratosthenes to find prime numbers while also learning about factors and multiples.
This is a great application to teach and practice patterns of addition, skip counting patterns and patterns of multiplication. So far as I can see it has its limit at 100. It may be even better if the tool is enabled to extend to much higher numbers.
dvssgkr
Richard A Cook
Evan-Moor Educational Publishers
https://www.mathlearningcenter.org/
Evan-Moor Educational Publishers
http://www.stormeducational.co.uk/
http://notfound.com.br/
MB
https://www.stormeducational.co.uk