Yes.
After defeating Sden in SLSH #230 Superboy took the Crystal of Catastrophe back to the 20th century for safe-keeping and the readers were told to get ADVENTURE COMICS #453 for the continuation of the story. Shortly after arriving in his home time, Superboy rescues a young girl named Barbara from drowning and takes her back to Camp Smallville, where she was berated by her older brother, Anthony, for being so reckless. Later, Clark joins his pals Lana and Pete as they go to the camp to entertain the younger kids. Meanwhile, Barbara wishes she could be a superhero like Superboy. Her request was granted by the nearby magic crystal which was still in Superboy's cape pouch. When the older kids prank the campers by pretending to be ghosts, Barbara transforms into Mighty Girl, and strikes a disguised Clark so hard, he would have been killed had he not been secretly Superboy. Superboy arrives to caution the girl in the use of her powers, but she refuses to listen, insisting she is ready to be a hero like him. However, her inexperience causes her impulsive actions to do more harm than good, and when Superboy deduces the source of Mighty Girl's abilities, he tosses the crystal into the sun. He advises the girl that true heroism can only be developed with time and hard work. In the final panel, the former Mighty Girl vows that the world will someday hear of Barbara Gordon.