Here is really nice set of resources on scientific notation. Eighth and ninth graders explore the concept of multiplying and dividing in scientific notation. In this multiplying and dividing numbers in scientific notation...

It's no secret that being able to competently use a calculator is an important skill. In this math lesson, young mathematicians learn how to use the counting constant function on their calculators to explore patterns and relationships...

Fourth graders practice working out a hidden number on a calculator by utilizing number sequence in the advanced multiplicative stage seven. They enter a number into their calculator and push the division sign once and go from there.