Danny Dunn and the Homework Machine

Danny uses a computer that Professor Bullfinch has created for NASA to prepare his homework, despite Professor Bullfinch's warning that Danny is to leave the machine alone. With his friend Joe Pearson and his new neighbor, Irene Miller, Danny has some success with the machine before it is sabotaged.
Danny must figure out what is wrong with the machine and correct the problem. But Danny's teacher has learned about the machine, and she has her own ideas for the Homework Champions...