TI-Basic Developer

I'm making my first game, but occasionally I am running into problems.

I have a program called REDUE. When it is called by another program, it contains a list of flash cards that the child has done incorrectly. REPEAT is supposed to be called over and over again until the child has done them all correctly. If 8 flash cards come over from the other program and the child does not do them all correctly and only does three correctly, then REDUE should display only the 5 remaining. This process should continue until all the flash cards have been answered. I do not know to do this, and need your help.

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