The phrase "allow them to know" is correct and usable in written English.
You can use it when you want to give permission or provide the opportunity for someone to be informed about something.
Example: "We should allow them to know about the changes in the schedule so they can plan accordingly."
Alternatives: "let them be aware" or "permit them to learn".
Mr. Oliver said: "I allow them to know there's no fear to worry about.
So I hope this book will allow them to know him — his genius, his compassion, his humanity".
This is a mistake, he reckons: the median household income of Asian-Americans is some $10,000 higher than that of non-Hispanic whites.Many modern Mad Men think digital media will allow them to know their audiences better, and feed them more precisely-tailored messages.
The power of the state to decide someone's guilt or bad intentions is most notoriously embodied by control orders, where individuals are held under house arrest and effectively deprived of their liberty and livelihood by a process that does not allow them to know the allegations against them or the length of the order.
Big data brokers, like Acxiom, have developed sophisticated tools that allow them to know almost as much about us as we know about ourselves; they then sell that data to all kinds of companies that want to learn everything from our habits to our health, from our sexual orientation to our finances.
"We thought to build a device to measure food, notify people in the household that the dog has been fed and allow them to know they're about to run out of food," Lipman said.
Large corporations pulled their advertising because the scale of the social media response allowed them to know what they are obsessed with knowing: the scale of the reputational threat to their own brands.
And that allowed them to know which water station the problem was originating from.
This paper provides a useful background for researchers in the tidal current energy domain and allows them to know the newest developments in large MCT projects around world.
But precisely because their vantage point allows them to know the inner workings of the law, lawyers are sworn to secrecy.
He will stick behind someone for lap after lap, allowing them to know he's there, studying where best he will be able to overtake.
