in 2013, peltz co-founded mystery science with keith schacht. mystery science creates open-and-go lessons for elementary teachers and helps them teach science without requiring a background in science. a couple notable interviews with y combinator, one their investors, detailed an unconventional business model in which the company sold to schools and districts across the united states without a sales team. mystery science has grown to be the most widely used science resource in american elementary schools; it is used by more than 50% of elementary schools reaching more than four million children each month. in october of 2020, mystery science became a wholly owned subsidiary of discovery education.