Wolfram Alpha
Wolfram Alpha is a computational knowledge engine. It is an online service that answers questions by finding the answer for you from 'curated date', instead of proving a list of documents that might contain the answer like a search engine like google might.
The site can be accessed here: https://www.wolframalpha.com/
The site can answer questions asked in a normal, conversation like way, and provides answers in a very understandable way.
It can be used in education as it allows students to finish homework faster. It even has a step by step method of solving math equations, so that if a student doesnt understand a question while they are at home doing homework, they do not have to wait for class tomorrow for the answer.
It is completly free, and has no user age limit that I have found.
