Seasons input grid
I have to admit that I can be pretty spontaneous with when I make my posters. Sometimes I will prep a chart in pencil ahead of time, then I go over it in pen while I'm teaching the lesson to my students. Other times I will make them on the fly when I have a teachable moment.
Recently a lot of students in my first grade class were struggling with the difference between seasons and weather. I kept hearing them say things like "my favorite weather is summer," or "snowy is my favorite season." It was cute the first time, but when it persisted I knew that I needed to try something else. I used an input grid chart to show the difference between seasons and weather, and since then my kiddos have been doing much better.
A writing ideas anchor chart
One tip that I have is to let students help you with the anchor charts. This creates buy - in and they are proud to see their work on display. However, make sure that the information is accurate. If they say something that is incorrect, you can lightly say "That is a great idea, but I am going to write something a little different on the chart."
Another tip is to draw the chart in front of students while you teach. Some charts take a long time, so it is better to break them up into multiple days of teaching. Your students will get restless if you have your back to them for too long.