While coming up with my idea for the posters I also came up with a little slogan for each:
Pick up the bat before you hit the ball.
Turn the door knob before you open the door.
These slogans can be helpful when writing the letters as well as when deciding which is which while reading. Plus both describe an action, so we can get our bodies moving which also helps when trying to remember something.
I also added some practice sheets to go with the posters. One to practice writing the letter while saying the slogan and the other to help identify the letter using the slogan and as a guide.
Let me know if these tools were helpful to you!
And have fun with b and d!