Geometry app

I found a nice little geometry app that helps students practice their vocabulary.  The app offers students the choice of a geometric shape.  One they choose a shape, the game begins.

A picture with a statement appears showing them what the item is.  There are blanks below this with possible letters under that.  If you select the correct letter, it flies into the blank place otherwise it flies up and then back to its place.  If the letter is correct it turns green, otherwise, it goes red.

You do have to do the letters in the correct order.  Notice that there are two types of hints, one puts a letter in the blanks, the other removes a possibility out of the available letters.  Since I work with ELL students, this will reinforce and help with their language development.