In this task, you will be shown a correct English sentence. You need to generate an incorrect form of the input sentence.
One example: Students shouldn't work multiple full-time jobs.
Solution is here: Student's shouldn't work many full-time jobs.
Explanation: The possessive form is not correct in this instance and many should be multiple.

Now, solve this: In order to do this , they need to learn additional skills , either theoretical or practical , that will increase their understanding and the future application of their chosen subjects . 
Solution:
Inorder to do this , they would need to learn additionally skills , either theoretical or practical , that would increase their understanding and future application of their chosen subject . 