This is pretty student-centered and I think it is a good idea to take the student's thoughts into consideration when there are issues, like Caleb from Tough Young Teachers. Self-evaluation worksheet to help monitor and have classroom management.
A website that has simple alphabet print outs, upper and lower case. they can be as small as a page or as big 16 pages each. All depends on your selection. And they are big enough for you to let your students draw in them (as seen here)
The Teachaholic: whiteboards! buy a pack of plastic sleeves and insert card stock (paper makes it too flimsy when they display their answer). use a ring clip to store them. You can even print lines or graph paper on the card stock if you find it useful.