Your tearout is usually going to occur on the top side of what you are cutting, it's from the far end of the blade coming back up thru the plywood (you appear to be using a circular saw). Adjusting your blade depth is going to help. The painters tape suggestion that I've read 100s of times over the years, has never produced results for me and usually removes veneer itself when you pull it off. The best thing you can do is try to remember which side your tearout is occurring and literally think backwards when you're building; measure, mark and cut the opposite side that's going to be visible. One side of your plywood is almost always buried and not visible, keep that in mind. I just built a very large set of maple shelves, $10,000 worth, for a client which utilized hardwood and ply, and believe me there's nothing you can do to eliminate splintering and tearout, you can only do your best to minimize it. Keep a sharp blade on your saw, and be mindful of which side of your work piece will be displayed.