hundred.org
In short: Getting listed on HundrED is free. Plan for about 10 minutes — it is a form plus links and assets you already have.
What they ask for: Apply with a privacy/digital-safety education program that demonstrates real K-12 impact and scalability.
Apply with a privacy/digital-safety education program that demonstrates real K-12 impact and scalability.
Current Global Collection 2028 call closes 2027-05-01; normally implemented for 1+ year and reached 1,000+ children; evidence required.
Open the submission page on hundred.org and complete its form — that is the "Open submit page" link at the top of this page.
Current Global Collection 2028 call closes 2027-05-01; normally implemented for 1+ year and reached 1,000+ children; evidence required.
Priority sets the band — this one is medium. Cost (free) and effort (quick) move it within that band, which puts it in the useful tier. The score orders a submission queue. It is not a measure of the site’s domain authority, traffic or quality.