Amazon to acquire online math portal TenMarks is acquiring TenMarks, an online mathematic tutoring site.

Terms of the acquisition were not disclosed. The acquisition is expected to close in the fourth quarter of 2013, subject to various closing conditions.

The partnership will help both companies develop rich educational content and applications, across multiple platforms that will benefit teachers, parents and students.

Amazon engages with millions of students around the world through Amazon Kindle ecosystem. Meanwhile TenMarks’s programs have been used by tens of thousands of schools across the world.

Ten Marks

“Amazon and TenMarks share a commitment to developing easy-to-implement solutions for schools and families,” said Rohit Agarwal, TenMarks co-founder.

TenMarks provides teachers, students and parents access to effective resources to foster the vision of the Common Core curriculum in math, including scalable professional development and tools for connecting with parents.

“We back this belief with our business model, where teachers can register and access our product for free, while being able to opt in for premium features, if needed.” The partnership will, in the long run create significant innovations in the K-12 arena, Agarwal said. buys text-to-speech technology company IVONA Software

Earlier this year, has acquired text-to-speech technology company IVONA Software.

IVONA’s technologies powers Text-to-Speech, Voice Guide and Explore by Touch features on Kindle Fire tablets IVONA delivers text-to-speech products and services for thousands of developers, businesses and customers around the world.

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