<p>Here is a link to the NW engineering coop program description (with schedules):
<a href=“Programs Overview | Engineering Career Development | Northwestern Engineering”>Programs Overview | Engineering Career Development | Northwestern Engineering;
<h2>It shows a total of six quarters of coop work periods (of which three are during summers) and one summer internship after freshman year. NW eng coops spend 12 quarters on campus in classes (just like any other eng student), but it is over five academic years.</h2>
<p>Concerning programs that charge fees during the coop period, per UIUC engineering co-op link :
<a href=“https://wiki.engr.illinois.edu/display/coeecs/Co-op+Program”>https://wiki.engr.illinois.edu/display/coeecs/Co-op+Program</a></p>
<p>"Cost of participation
Students who participate in the co-op program need to register for the appropriate Engineering course if they wish to maintain student status. Undergrad tuition and fees for such courses is approximately $1,500-$1,700 per semester and is sometimes paid by the employer</p>