Valuable pictorial math materials are

A. blocks.
B. buttons.
C. flash cards.
D. picture books.

c. is my answer.

Again, I'd say all of the above. Are flash cards still used extensively? Your answer seems right, but there is evidence that blocks and buttons are effective tools, too.

I have to choose one answer.

I know. If flash cards are used a lot more than the others, go with it!

Most flashcards aren't pictorial.

Neither are blocks or buttons pictorial per se, but give a visual experience. Given the "pictorial" parameter, then the picture book is the obvious answer.

thanks for your help.

That's correct! Flash cards are indeed considered valuable pictorial math materials. They are a great tool for visualizing mathematical concepts and practicing calculations.

If you were unsure about the answer, let me explain how you can approach this type of question. To determine which option is the correct answer, you need to consider the question and evaluate each option.

In this case, the question asks for valuable pictorial math materials. You need to think about which items would be helpful for learning and understanding math concepts when represented visually.

Let's go over the options:

A. Blocks: While blocks can be used for hands-on learning and building spatial reasoning, they may not specifically be designed for math purposes. So, we can eliminate this option.

B. Buttons: Buttons are not typically associated with math learning, so we can eliminate this option as well.

C. Flash cards: Flash cards are specifically designed for learning and practicing various subjects, including math. They often contain numerical equations or visual representations of math concepts, making them useful for studying math. This could be a potential answer.

D. Picture books: While picture books can engage young learners and introduce math concepts, they are not typically considered as direct math learning materials. Therefore, we can eliminate this option.

From evaluating these options, we find that flash cards (option C) are the most suitable and directly related to valuable pictorial math materials.