Pictures, then bars
The same graph drawn two ways, so children see that a bar is just a column of them.
For kindergarten to grade 2
Ask a question, and each child puts a face in a column. Then read the graph together: how many, which has the most, how many more.
Free, with no sign-up. Nothing about you or your class is kept.
Try it now. No sign-up needed.
Which pet do you like best?
This is the real graph. The full graph and its lessons are free, with one face for every child in your class.
The same graph drawn two ways, so children see that a bar is just a column of them.
A lesson gives you a survey and the questions to ask: "How many chose dog?" in kindergarten, "How many more?" by grade 1, four columns by grade 2.
Every lesson has its own link, with the number of children in your class. Bookmark it, open it on the board, or send it home and the same survey and questions come up on a phone or tablet.