This is a main classification of Kingdom Animalia. I brainstorming it to make it easy for students. Acoelomate actually dipoblastic and coelomate is tripoblastic. You can see for youself. Where human lies, deuterostomes, including the primate and apes, that craps, but because it in syllabus, students usually need to remember it.
*Hint for students- try to brain storm when study Biology