Here are 4 quick & easy center ideas that are student-led and require only a brief introduction before use.
My focus was vocabulary, spelling, & comprehension review for Tales of the Fourth Grade Nothing, but these can be used with any story or topic in any content area.
The apps referenced are free and FUN!
I printed each page in color and laminated the copies so I could easily display the activities during center time. I would usually use one activity per week.