Function to return value if a string contains similar values

I have data in two sheets that contain different string values for the same entity. For example, in Sheet A, a string is entered as "Biology" in A1, but in Sheet B it is entered as "Biology Course".

My goal is to find if the string in Sheet A is located in Sheet B, and then return the value that is in the cell below the string.

In other words if Sheet A looks like this:

And Sheet B looks like this:

Then I would like to return the value "200" in Sheet A. Thank you!