I recently shared this video of my two-year old son doing a basic addition problem.
A good friend asked if he really knew what he was doing or if he was repeating what I said. I argued that he absolutely knows the concept behind adding because we have modeled it many times. He doesn’t necessarily know what the word “plus” means yet but he understands the idea of putting more together. His understanding of “more” will help with addition problem-solving in the future.
We moved on to modeling two fingers and adding thee more. I ask my son how many we have altogether. He counts and says, “five”.
“More” and “altogether” will later translate to “add” and “equals”.