The latest effort to improve early childhood education for poor children comes from the richest man alive: Amazon founder Jeff Bezos.

Bezos announced today on Twitter that he would be pouring $2 billion into two major initiatives, including “a network of new, non-profit, tier-one preschools in low-income communities.”

The preschools, Bezos wrote, will be free for students and inspired by the Montessori approach, in which children direct their own learning in an environment that is prepared for them to explore. Montessori instruction has traditionally been available only in private schools, but new efforts to make the model more accessible have taken hold, and recent research suggests that it benefits children from low-income families.

Bezos also signaled that he intends to apply his famously stringent standards to the new schools. The hands-on CEO reportedly still reads emails from Amazon customers and has been known to berate executives when the customer experience suffers. At the preschools, he wrote, “The child will be the customer.”

Much about the initiative is unclear, from what “tier-one” means to where, when, and how many schools will open. Bezos’s announcement did not acknowledge the current bipartisan movement to fund preschool more widely, so it’s unclear whether his network might ever seek public money or how it might interact with — or even crowd out — existing efforts to expand preschools.

It’s also not clear how much transparency to expect from Bezos’s effort, which he called the Day One Fund. A number of wealthy individuals, including Mark Zuckerberg, have organized their giving through a limited liability company, rather than a nonprofit. This approach does not require disclosing who receives grants and allows the organizations to give to political causes and invest in for-profit companies.

Research has pointed to long-run benefits of early childhood education programs. One recent study found that the benefits extended to multiple generations — the children of children who participated in the federal Head Start program were more likely to graduate from high school and attend college.

In addition to preschools, the Day One Fund will tackle homelessness, according to Bezos, who crafted his giving strategy after asking his Twitter followers how he should spend his wealth.