Formative vs. Summative

I had a design project for digial story telling two years ago.In the end of project, I need to set up formative assessment for my project. i use formative assessment approaches guide my students toward development of their own learning to learn skils. when i design assessment , i always misunderstood the distincion between the terms "evaluation"and "assessment." when you design formative assessment for your project, some things you should know about it

1.evaluation and assessment is synonyms, it refers to different levels of investigation

2. assessement is to measure of student learning . evaluation is focusing on macro or holistic level of the learning.

3. an evaluation is a designed and purposeful enquiry that is open to discussion.