Teoh-backed textbook seller Zookal in 'cheat sheet' play
![Zookal co-founder Ahmed Haider: putting the sharing of 'cheat sheets' into an online marketplace](/content/dam/images/g/n/t/d/q/h/image.related.afrIndexLead.320x210.gnt1lm.png/1459243695241.jpg)
A textbook merchant backed by two sons of TPG Telecom boss David Teoh is raising over $5 million to build on a 'cheat sheet' video platform already used by 70,000 Singaporean university students.