Last time I looked there were 26 letters in the English alphabet and over 44 sounds. So it doesn't quite add up that you are teaching for a month at 3 letters per week. Even if the month has 5 weeks you won't cover them all.
There is a really good singing program to learn the alphabet called "Sing, Spell, Read and Write".
http://www.pearsonlearning.com/index.cfm?a=65
There are tons of games in the toy stores.
If you Google "Alphabet" there are full curriculums.
You could introduce the letter and get them to write it in capital and small letters in a special alphabet notebook with large lines.
Then you could play games with sticks or playdough or in sand to make the letter. Or the children could make the letters with their bodies, alone or in pairs. Take pictures to post.
You could have pictures of things that start with the letter and teach the names of the pictures in English. Then you could play bingo with the pictures or have cards to match or play memory with the cards turned over.
You could put sticky notes on all the things in the classroom that start with A including children whose name starts with the letter.
You could start a alphabet calendar and add a letter a day until you fill it up - I have seen them in the stores and they are made with little pockets with the letter on the outside and something representing the letter in the pocket. That will help you reivew as you build on more letters.
You can have posters with alphabet trains, animals in alphabetical order, methods of transportation, colours, names of the children in alphabetial order, food, parts of the body. You also buy material with these things on them to make wall hangings. They have Christmas, Hallowe'en alphabets too.
You can sing the alphabet song endlessly.
You can make handouts of a picture dictionary for each child to take home and practice with some kind of activity on them for homework.
You can buy a pack of alphabet cards and play numerous games with them - they usually include game rules with the pack. If you have enough money you could buy a pack for each child or at least one for a pair.
You can start an alphabet path on the floor of your classroom, adding a letter a day until the children can hop the whole 26. I used tape but there are rubber mats with the alphabet printed on them and I have even seen a carpet with the path around the edge.
We bought small rubber letters that hooked together like a puzzle so the children could do that in small groups. Then we combined the letters in boxes with four sides and a bottom of the same letter and put things in the boxes that started with that letter - a had an apple, a small plastic alligator, the puppet Alice, an ant puppet, an acorn, and so on. You can play all sorts of games with these boxes from getting to feel inside with their eyes close to identify the objects once they know their names to team games to fill up the boxes.
When they do learn all 26 letters you can have a graduation ceremony with each child being one letter of the alphabet. Invite the parents and have the children perform the alphabet song and anything else they can do by that time of year. You can have food and prizes if you really want to make a big deal of it like we did in Mongolia. We had a great party, the children dressed up in their best, the parents brought food and presents, even for the teachers, we played alphabet games, took lots of pictures and had a great time.
It might be important to tell the children that you are teaching them the names of the alphabet first, just like they have a name but soon you will be teaching them sounds and some letters have more than one sound.
It seems to me that the children have a lot of trouble learning the difference between the capital and small letters and that they both mean the same thing so I would concentrate a little harder on that aspect and try to explain why they need both. It doesn't make much sense to them.
I played a lot of Bingo by showing the capital and them having to match it to the small letter and vice versa.
For prizes I gave them stickers with the letters for their names to put on books or cell phones, backpacks, etc.
My favourite website for worksheets is enchantedlearning.com.
I also really enjoyed teaching from the first book of the Let's Go series and made puppets out of the characters - A my name is Alice with its jazz chant. That also made a nice little show for the parents at the end of learning all 26 letters.
We talked about this at :
http://forums.eslcafe.com/teacher/viewt ... t=alphabet