Praise be to Allaah.
Pictures are haraam as stated in the question. From the hadeeth about the curtain which ‘Aa’ishah (may Allaah be pleased with her) used as a screen in her house, it is clear that pictures are haraam, even those which do not cast a shadow (i.e., two-dimensional). The fact that these pictures are for educational purposes does not justify allowing them in this case. Making images is haraam except in cases of necessity, because in cases of necessity, things which are ordinarily forbidden may be permitted. Although some (scholars) permit such pictures for educational purposes, to be on the safe side, it is better not to allow it, especially since the aim can be achieved through other means.
Shaykh ‘Abd al-Kareem al-KhudayrIf you denounce them and do not take part in this project, you will have freed yourself from blame and there will be no sin on you. May Allaah help us and you to do all that is good.