Secondary centers
Some suggestions for some centers for secondary students are:
Seasonal Centers- If there is a holiday or holdays in a month find a reading passage put it in a ziplock bag with some sticky notes and have them write down the plot elements on the sticky note and then put the post it note where they found they found the element ( introduction, conflict, rising action, climax, falling action, resolution)
You can always put a short novel in a bag and offer then mini project ideas to complete once they are finished reading the novel, or you can have them do certain little mini assignments for each chapter.
You can have a vocabulary center where you cut up the words and definitions and put them in an envelope and allow them to practice matching up the correct word to the right definition. ( this can be individual or partner )
Have a Poe-Tree corner, where you have a poetry tree on the wall and students select a type of poem from a container, construct the poem, turn it in, and once you have okay'd it allow them to hand it on the tree.
In my classroom I have a general student center, where I set up an area for early finishers to select novels, word search puzzles or other activity sheets, comic books, and etc. I make it mandatory that they visit this corner. I do make little changes when I change my units in class.