I have to write an essay for class. The topic is: Is too much emphasis placed on grades in our system? Explain.

Is this a strong or weak thesis? Our educational system is to mandated when it comes to grades.

Your sentence doesn't make sense. The word "mandated" is not used correctly (and the word before it should be "too" not "to").

Find another word for "mandated" and repost please.
http://www.thesaurus.com

Our educational system is too strict when it comes to grades.

How about --

Too much importance is attached to grades in our educational system.

To determine if the thesis statement "Our educational system is too mandated when it comes to grades" is strong or weak, we need to evaluate its clarity, specificity, and argumentative strength.

Upon initial review, this thesis statement appears to be somewhat vague and lacks specificity. To strengthen the thesis, consider rephrasing it to make a specific argument about the emphasis placed on grades in the educational system.

Here's an example of a stronger thesis statement: "The current emphasis on grades in our educational system has resulted in negative consequences, including increased stress levels among students and a diminishing focus on holistic learning and personal growth."

This revised thesis statement is more specific, clearly articulates the argument, and provides a preview of the points that will be addressed in the essay.