The correct answer to this open question is the following.
Unfortunately, there are no more references or context attached. However, we can comment on the following terms.
Textual aids are educational instruments that are used in classrooms and
workplaces and serve to increase the teaching tools to improve the quality of education. Some of these texts serve to simplify texts in the classroom. Images are commonly known to be an important part of these texts because they add visual content that allows students to better understand the lessons and make them more fun.
One good example of textual aids is commonly known as cause and effect diagram and serves to identify the consequences of the decisions made.
