Content engine which is included in author can be used to create lessons and arrange them in levels (like subject, topic, chapters), it allows entering remote URL, text, html, pdf, image, video, audio, multimedia, docx, excel, and ppt files.
For a detailed description of the LAAS content engine, please visit here.
https://www.simexams.com/products/laas/laas-content-engine-features.htmlAlso checkout related blog with more info on the LAAS software:
AnandSoft Releases Learning and Assessment Software for eLearning – AnandSoft BlogTrial version of the software may be downloaded here
https://www.anandsoft.com/LAAS/learning-assessment-software.html