So I saw that you needed help, so I looked it up, but then I realized that I already knew a few things about the Culper Spy Ring. Here's a few facts you could use:
It was formed by American Major Benjamin Tallmadge under orders from General George Washington in 1778
The name "Culper" was suggested by Washington, and it was named after Culpeper County, Virginia
The two main members of the ring were Abraham Woodhull and Robert
Townsend
Members were both men and women
Their main responsibility was to provide information about British movement. At one point they sent word to Washington the British forces were planning a surprise attack on French Lieutenant General Rochambeau, as well as reporting the British planned to use counterfeit American currency on Continental dollar paper to get the Continental Congress to retire the bills. They told Washington British Major General William Tyron's raid was a diversion, so that Lieutenant General Sir Henry Clinton could attack him by surprise. They also found out that a high-ranking American official named Benedict Arnold was hiding out as a British spy.
Though nothing was ever confirmed, many say the Culper Ring exposed an attempt on General Washington's life.
There was a female spy who is only known as Agent 355. Her identity remains unknown to this day.
Hope that helps!
