When I taught kindergarten, I used these cute little letter identification charts with my students. I would point to a letter and if they could correctly identify it, they would get a stamp, if not, it was left blank. They took them home so their parents knew which letters to be working on.
Since my daughter has started identifying letters recently, I wanted to print a chart out for my own records. I don't use them in the same way. I don't point to letters and see if she knows them. I just make a mental note whenever I hear her say a new letter when she sees one (in a book, on a sign) and then use a bingo marker to mark the ones she knows. I'm so impressed with the ones she already knows!
I printed the charts at Making Learning Fun. I have one uppercase sheet and one lowercase sheet. I wrote the months I would be using them in the upper corner. I plan to print out different ones with the seasons and just tuck them away in a folder until she has a set of filled up ABC's!