ei bi si di i ef lli.

The ABC.
Ok, so you all can marrymade-ly sing that song even being in comma. But your students can't, or (even worse) they may think that they can, but they do a horrible, deaf chicano accent that is harder to erase than my sins. Learning the abc must be fun (as everything you do, otherwise you'll hate your job, Ss will hate you and life will be hell for a year.

Nametags. Maybe by now you can identify the names of most students, or maybe you don't have an idea. you MUST NEVER say "you" to a student. That word is processed as impersonal and may do something in the affective filter, something so subtle that won't be seem till it's too late. Give them a nametag and ask them to write their name. Then, teach them the basic things about spelling "with A of analfabetiano garcia, with B of babosa dejadecomertetulapiz, etc" Then tell them to exchange names.
Then they hide the one they're holding and go aroun the classroom.
Is your name E-U-F-R-O-S-I-N-A? no, it isn't (PLEASE, avoid explaining the grammar behind it. Children don't care about grammar and if you know your job you shouldn't either).
If they are too noisy, make two lines and have them face each other so you keep them controlled and change places when you clap.
They won't get it the first time and make sure you have repeated the complete alphabet before going into this activity.

But, but, what about those beautiful posters of animals, objects, etc that I made for the ABC? (or that I bought because I'm not into crafts (as if there were a teacher bad at ccrafts, believe me, you'll learn)) easy. Students will not learn the complete alfabet in one day. So it must be clung somewhere visible in the classroom. And if you don't have one, better! Homework can be for each of them to bring a sheet size illustration of something that starts with one letter (or more, if few students). Ss will feel the classroom is theirs, practice, and you will have something to stop looking at those dull walls.

Behind them The ABC must be meaningful for Ss. But what can be meaningful in another language for students that don't know a word in English? their own name. it's too early for start introducing themselves. It's input, it's meaningful, and works.