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Practice figuring out the missing number when adding to 20. Missing addend is in the 3rd spot.
Love this app! Great for Sign Language. This is the first app I found that breaks down sign language in the way it should be learned. By topic and with individual videos of the words. Love it!!
Now parents can learn ASL while standing on line at the grocery line, while sitting at the doctor’s office, anytime. Same thing with the students. They can practice it on the bus, in the car. It’s jus...
I needed something to help with metrology. It was simple and easy, just what I needed.