Secondary Education: 90s Power Ranger Science-Themed Throwback

Three high school students are forced to make up a chemistry test during after school detention. Over the afternoon, they discover that their Chemistry teacher, Mr Yamamoto, has been leading a secret life as a crime-fighting Power Ranger. When an escaped mutant lobster shows up in the hallways seeking revenge for his arrest at the hands of Mr Yamamoto, they must use the science principles from the test that they failed to help him defeat it.