Usually students take a pre-assessment and the teacher is the only one to see the results. If we look at a pre-assessment as a formative assessment, then the students not only need to see the results but also need to be presented with new information or strategies to help them learn the standards-based material. The pre-assessment tells the students where they are in terms of the standard and where they need to be. A score such as 70 does not help them. Seeing which items they did well on and which they did not do well on provides them with an awareness about their present learning.
One technique is to have a checklist that you use to evaluate the pre-assessment. You check off those student strengthens that are present. Students can see what strengthens they have and know what areas they need to improve in. You can refer to a handout, textbook, or website that can help the students as they begin to progress in the standard.
Another technique is to have an online system that tells if each answer is correct or not. More important, you make a comment after the correct answer to explain the correct answer. Students can understand why they had an incorrect answer and begin to understand what is required for a correct answer. They have more than right or wrong; they have the start of their future learning in the standard.