The phrase "simple course" is correct and usable in written English.
You can use it when you want to describe an easy task or process. For example, "The employee training manual provided a simple course for new hires to follow."
A simple course of antibiotics is usually needed to fight the scarlet fever.
They simple course of action would be for the government to play the fairs.
With Manny gone, once again her life resumed its simple course — dinner with wine, magazines on the table.
One simple course of action could have ended the crisis they were facing, and they had not tried it.
I abandoned myself to the most natural and simple course, as I do always, and gave orders for them to be let in.
It is now known that a peptic ulcer (a sore on the lining of the stomach or duodenum) is not caused by stress or eating spicy foods, as was once thought; rather, most peptic ulcers are caused by the infectious bacterial agent Helicobacter pylori and can be treated by a simple course of antibiotics.
Several education startups that launched in 2012 attracted millions of students with relatively simple courses.
I gazed at the river a few hundred yards away, because the simple, coursing water often quiets all sorts of ills in a way that defies explanation.
In the 1920s, when the game was intensely in vogue, its reach broadened, with simple courses found in suburban parks, on urban rooftops and in empty lots across America.
Pilotwings Resort (cert 3) returns to the idyllic Wuhu Island featured in Wii Sports Resort and Wii Fit Plus, offering a range of flying vehicles from a glider to a jetpack to navigate a series of simple courses.
The content architecture is simple: courses and lessons.
