I would use this material when i was teaching Astronomy. I wouldn't use it during an introductory lesson but i would use it as a fun add on. There are many interactives to choose from and many the children can relate to. This would help with a deeper connection to what they are learning and show them how interesting and useful the stars have been throughout history for scientific purposes as well as in mythology.
This mertial is very useful for the entire unit of Dynamic Earth. There are many simulations based on the plat motions and convection currents. I would definatly use this along with the readings for each stage so the students can read about the mechanics as well as see them occur.
I could use BrainPOP Science for almost every unit that needs to be taught. There are so many different topics that are covered in easy to understand and interactive ways. The only down side is that you need to sign up for the website and its $200+. This would be good if the whole school was involved
I would use this app in the introduction unit to earth science. There are many features including what the earth has looked like through time as well as a time scale that the students can view and see exactly how much time has passed. This is necessary for them to understand when thinking about how slowly geologic processes take place.