course as product in woocommerce store

Hi

I have created some courses but on the shop page thet appear without image

http://seo-splash.co.il/nitza/shop/

https://postimg.org/image/i34iqrpwx/

Why arent the images appearing in the woocommerce shop ?

they do appear in the /courses page

also

If I would like to remove courses from from shop page how can that be achieved ?