This is what I do at home and I thought you may all like to join me as we are just starting over!
I do a letter a week. I go in alphabetical order and then start over. I have these super cute Nerdy Baby ABC Flashcards for Very Young Scientists
This is how you do it. Monday morning you show your child/ren the flashcard and letter of the week. Tell them the letter and have them repeat. Say a few nouns that start with the letter (think airplane instead of amazing...much easier for young children to understand nouns, parents). Put it on the fridge and continue your life. Every morning point out and say the letter. Every time you see that letter (ok, maybe not every time) throughout the week on a sign you are walking by or in a book you read, point it out.
Next week, go onto the next letter and so on.
No child is too young for this. You read to your newborn, may as well engage them more by pointing out some letters...plus it might keep the new, first time mom from going as insane! If your child is older, consider adding a vocabulary word or a multiplication family (think 2 x 1, 2 x 2, 2 x 3 etc).
Teaching your child in this non forceful, no stress manner will give your child the knowledge they need to succeed and the confidence they need to thrive without the pressure to preform. It is the least we can do for our children.