All three AIs - Google, Microsoft, and DuckDuckGo - have their strengths and can be useful for homework and general purposes. Google and Microsoft have more advanced AI and offer personalized results, but require signing in. DuckDuckGo prioritizes privacy and doesn't require sign-in, but its AI might not be as advanced.
Google and Microsoft have SafeSearch features to filter explicit content, while DuckDuckGo has a Safe Search option. However, no filter is 100% accurate, so parental guidance is recommended.
"Socratic by Google" is updated regularly to improve its features and keep the information current. It's designed to be a learning tool, so it should be safe for kids aged 13-15. However, it's always a good idea to monitor usage to ensure safety.